Definition of theory in English:

theory

nounPlural theories ˈθɪəriˈθɪri

1A supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained.
Darwin's theory of evolution
Example sentencesExamples
- Do you think that Hume wanted a general theory of human nature to explain why human beings act, think, perceive and feel in all of the ways that we do?
- In geology, the theory of evolution could explain two agreed facts that had given the scriptural view of creation a hard time.
- Theories do not become facts; theories explain facts, and a well validated theory does not turn into something else; it remains a theory forever.
- Pope John Paul II has already explained that the theory of evolution is not irreconcilable with the creation doctrine.
- She neatly interweaves discussions of online behavior with social science theories that may explain some Internet phenomena.
- In 1915, with his theory of general relativity, Einstein extended this hypothesis to include gravitation.
- No general theory explaining breeding dispersal has yet been formalized, but two main hypotheses have emerged.
- Hypotheses and theories are generally based on objective inferences, unlike opinions, which are generally based on subjective influences.
- Objections to the general theory of evolution are presented in both Darwin's conclusion and glossary of terms.
- But bundle theory is supposed to explain the structure of things on a metaphysical, not scientific level.
- Social cognitive theory, ecological systems theory and cultural-historical theory have a contextual base.
- That was before he started questioning whether Darwin's theory of evolution fully explained life on earth.
- He is regarded as the founder of the general functionalist theory of the social system.
- Eventually Einstein's general relativity theory explained the phenomenon in terms of a distortion of the fabric of space by the Sun's gravity.
- In general, this theory attempts to explain when and how people adopt new behaviors.
- All makers of monolithic theories want their theories to explain everything, and they want them to be strong and relatively simple.
- No matter how hard we try to produce theories and hypotheses to explain the market, it will always prove to be unpredictable.
- Religious-mystical theories, biological theories and socio-historical theories explain the existence of the caste system.
- Instead, he now requires them to be able to explain the scientific theory of evolution.
- Evolutionary theories attempt to explain how the fact of evolution occurs.
Synonyms
hypothesis, thesis, conjecture, supposition, speculation, postulation, postulate, proposition, premise, surmise, assumption, presumption, presupposition, notion, guess, hunch, feeling, suspicion
opinion, view, belief, thinking, thought(s), judgement, contention
principles, ideas, concepts
principled explanations
laws
philosophy, ideology, system of ideas, science
1. 1.1 A set of principles on which the practice of an activity is based.
  a theory of education
  mass noun music theory
  Example sentencesExamples
  On the debit side it seems we don't always have the players with the required levels of skill to carry the theory into practice.
  In an interview with this magazine, he offered some of his best thinking on the theory and practice of managing knowledge.
  However, in both the Christian and the Islamic worlds, it was the theory, not the practice of music that held sway as an intellectual pursuit.
  But theory and practice never seem to square properly with each other.
  Cayley's book was written at a time when the rehabilitative theory and practice of prisons, parole and other measures were under attack from the right.
  Really good trainers know it's important to make you perform each task - but how many of them put the theory into practice?
  The author proposes that only through a knowledge of music theory and practice can one understand the origins of modern science.
  But they also learn the theory and practice of guerrilla warfare.
  The principles link theory and practice, they translate the theoretical positions into the language of military practice.
  Much is known about the biological effects of radiation, and the theory and practice of human radiation protection has been developed in a systematic way.
  What follows foregrounds just some of the implications of biomedicine for the theory and practice of public mental health.
  The journal provides a forum for the discussion of the theory and practice of drama and theatre education.
  And he was a rare example of a scholar who put his theories into practice, both inside and outside the classroom.
  His research spans economic history, methodology, and the theory and practice of interdisciplinarity.
  It was a residential programme which accepted successful applicants for two years of training in the theory of education and practice of teaching.
  Nowadays it's not so common for writers to put their theory into practice!
  If the argument of this essay is valid, then we face a major task of reassessment of much of the theory and practice of Christian spirituality.
  The problem is that it's a lot harder to put the theory into practice.
  Whatever it comes to be called, we know it as the discipline devoted to the theory and practice of writing and teaching writing.
  A simple theoretical construct underlies the theory and practice of counterinsurgency warfare.
  Synonyms
  doctrine, dogma, teaching, principle, ethic, creed, credo, thesis, ideology, idea, ideal, position
2. 1.2 An idea used to account for a situation or justify a course of action.
  my theory would be that the place has been seriously mismanaged
  Example sentencesExamples
  He replied that polygenists in the United States had in fact used their theories to justify slavery.
  My theory, of course, is that these were all written by one person using various pseudonyms.
  Blake was beginning to develop a new theory to account for what seemed to be going on around him.
  And of course, as the theory of nuclear deterrence ordains, India and Pakistan, being nuclear powers, would never go to war again.
  And of course my personal theory on this is that women, who do childbirth after all, can handle a lot more pain.
  There are, officers say, five theories which could account for his death.
  Besides the miraculous escape, the theory also accounts for the waters flowing back to destroy the Pharaoh's army that chased Moses and the Jews.
  Of course, the theory is very attractive, and leads many medical doctors and public health officials to believe we should vaccinate more often and against many more diseases.
  In any case, much qualitative research entails the testing of theories in the course of the research process.
  That's only a theory, of course, but one which I'm willing to defend.
  The experts laugh at my theories of course until I point out that they help me manage and live with the pain.
  There are many theories about Vietnam of course.
  Those are wonderful theories and of course, no one can ever prove them right or wrong.
  Of course, the simplest theory is that he did so well because he was a very good swimmer!
  There is no evidence to support such theories, of course, but hey - since when do liberals need evidence?
  It may be that in a federal constitutional situation your theory is correct.
  He took a step towards me, his eyes searching, ‘I have my theories, of course.’
  His theory does not adequately account for the dual powers of divine conflagration and divine grace.
  And of course there is the theory that the dinosaurs were wiped out by a mega-tsunami caused by an asteroid.
  I have no other proof than logic, and so far events have justified my theory.
  Synonyms
  opinion, point of view, viewpoint, belief, judgement, reckoning, way of thinking, thinking, thought, notion, idea, conviction, persuasion, attitude, feeling, sentiment, impression, concept, conception, hypothesis, thesis, estimate, estimation, conclusion, verdict
3. 1.3Mathematics A collection of propositions to illustrate the principles of a subject.
  Example sentencesExamples
  Bolzano's theories of mathematical infinity anticipated Georg Cantor's theory of infinite sets.
  This restriction makes the subject very different from the knot theory traditionally studied by mathematicians.
  However he made many contributions to number theory and to the theory of equations.
  Goldbach also studied infinite sums, the theory of curves and the theory of equations.
  In particular he strongly criticised Cantor's and Dedekind's theories of irrational numbers.
  His mathematical work covered Cartesian geometry and the theory of equations.

Phrases

in theory

Used in describing what is supposed to happen or be possible, usually with the implication that it does not in fact happen.
in theory, things can only get better; in practice, they may well become a lot worse
Example sentencesExamples
- The software makes it possible, in theory, to see and manage files on any storage system or server.
- The precautionary principle sounds good in theory, but in practice it is a nightmare.
- However, although this sounds good in theory, in practice it never quite seems to work that way.
- These are ideas which are beautiful in theory but limp and bedraggled in practice.
- Radar also uses microwaves, so that in theory it would be possible to cook food by putting it at the focus of a radar dish.
- In theory it may seem like a great idea but, in theory, so do so many ideas until they are put into practice.
- The Freedom of Information Act is, in theory, a way of ensuring that happens.
- Working on Saturdays is always confusing because we start earlier and, in theory, end earlier.
- This concept, though brilliant in theory, is utterly, utterly painful in practice.
- While in theory that's an admirable trait, in practice it's pretty uncomfortable.
Synonyms
in principle, on paper, in the abstract, all things being equal, in an ideal world

Origin

Late 16th century (denoting a mental scheme of something to be done): via late Latin from Greek theōria 'contemplation, speculation', from theōros 'spectator'.

Rhymes

beery, bleary, cheery, dearie, dreary, Dun Laoghaire, eerie, eyrie (US aerie), Kashmiri, leery, peri, praemunire, query, smeary, teary, weary

Definition of theory in US English:

theory

nounˈTHirēˈθɪri

1A supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained.
Darwin's theory of evolution
Example sentencesExamples
- That was before he started questioning whether Darwin's theory of evolution fully explained life on earth.
- Pope John Paul II has already explained that the theory of evolution is not irreconcilable with the creation doctrine.
- No general theory explaining breeding dispersal has yet been formalized, but two main hypotheses have emerged.
- Instead, he now requires them to be able to explain the scientific theory of evolution.
- Objections to the general theory of evolution are presented in both Darwin's conclusion and glossary of terms.
- Evolutionary theories attempt to explain how the fact of evolution occurs.
- In general, this theory attempts to explain when and how people adopt new behaviors.
- Do you think that Hume wanted a general theory of human nature to explain why human beings act, think, perceive and feel in all of the ways that we do?
- Religious-mystical theories, biological theories and socio-historical theories explain the existence of the caste system.
- In 1915, with his theory of general relativity, Einstein extended this hypothesis to include gravitation.
- No matter how hard we try to produce theories and hypotheses to explain the market, it will always prove to be unpredictable.
- Hypotheses and theories are generally based on objective inferences, unlike opinions, which are generally based on subjective influences.
- In geology, the theory of evolution could explain two agreed facts that had given the scriptural view of creation a hard time.
- But bundle theory is supposed to explain the structure of things on a metaphysical, not scientific level.
- He is regarded as the founder of the general functionalist theory of the social system.
- Eventually Einstein's general relativity theory explained the phenomenon in terms of a distortion of the fabric of space by the Sun's gravity.
- She neatly interweaves discussions of online behavior with social science theories that may explain some Internet phenomena.
- All makers of monolithic theories want their theories to explain everything, and they want them to be strong and relatively simple.
- Theories do not become facts; theories explain facts, and a well validated theory does not turn into something else; it remains a theory forever.
- Social cognitive theory, ecological systems theory and cultural-historical theory have a contextual base.
Synonyms
hypothesis, thesis, conjecture, supposition, speculation, postulation, postulate, proposition, premise, surmise, assumption, presumption, presupposition, notion, guess, hunch, feeling, suspicion
principles, ideas, concepts
1. 1.1 A set of principles on which the practice of an activity is based.
  a theory of education
  music theory
  Example sentencesExamples
  Whatever it comes to be called, we know it as the discipline devoted to the theory and practice of writing and teaching writing.
  Cayley's book was written at a time when the rehabilitative theory and practice of prisons, parole and other measures were under attack from the right.
  The principles link theory and practice, they translate the theoretical positions into the language of military practice.
  His research spans economic history, methodology, and the theory and practice of interdisciplinarity.
  What follows foregrounds just some of the implications of biomedicine for the theory and practice of public mental health.
  On the debit side it seems we don't always have the players with the required levels of skill to carry the theory into practice.
  The author proposes that only through a knowledge of music theory and practice can one understand the origins of modern science.
  However, in both the Christian and the Islamic worlds, it was the theory, not the practice of music that held sway as an intellectual pursuit.
  But theory and practice never seem to square properly with each other.
  Really good trainers know it's important to make you perform each task - but how many of them put the theory into practice?
  In an interview with this magazine, he offered some of his best thinking on the theory and practice of managing knowledge.
  But they also learn the theory and practice of guerrilla warfare.
  The problem is that it's a lot harder to put the theory into practice.
  Nowadays it's not so common for writers to put their theory into practice!
  Much is known about the biological effects of radiation, and the theory and practice of human radiation protection has been developed in a systematic way.
  The journal provides a forum for the discussion of the theory and practice of drama and theatre education.
  It was a residential programme which accepted successful applicants for two years of training in the theory of education and practice of teaching.
  And he was a rare example of a scholar who put his theories into practice, both inside and outside the classroom.
  If the argument of this essay is valid, then we face a major task of reassessment of much of the theory and practice of Christian spirituality.
  A simple theoretical construct underlies the theory and practice of counterinsurgency warfare.
  Synonyms
  doctrine, dogma, teaching, principle, ethic, creed, credo, thesis, ideology, idea, ideal, position
2. 1.2 An idea used to account for a situation or justify a course of action.
  my theory would be that the place has been seriously mismanaged
  Example sentencesExamples
  Blake was beginning to develop a new theory to account for what seemed to be going on around him.
  Of course, the simplest theory is that he did so well because he was a very good swimmer!
  His theory does not adequately account for the dual powers of divine conflagration and divine grace.
  Those are wonderful theories and of course, no one can ever prove them right or wrong.
  Besides the miraculous escape, the theory also accounts for the waters flowing back to destroy the Pharaoh's army that chased Moses and the Jews.
  There are, officers say, five theories which could account for his death.
  And of course my personal theory on this is that women, who do childbirth after all, can handle a lot more pain.
  There are many theories about Vietnam of course.
  He replied that polygenists in the United States had in fact used their theories to justify slavery.
  It may be that in a federal constitutional situation your theory is correct.
  That's only a theory, of course, but one which I'm willing to defend.
  And of course there is the theory that the dinosaurs were wiped out by a mega-tsunami caused by an asteroid.
  He took a step towards me, his eyes searching, ‘I have my theories, of course.’
  The experts laugh at my theories of course until I point out that they help me manage and live with the pain.
  I have no other proof than logic, and so far events have justified my theory.
  Of course, the theory is very attractive, and leads many medical doctors and public health officials to believe we should vaccinate more often and against many more diseases.
  In any case, much qualitative research entails the testing of theories in the course of the research process.
  My theory, of course, is that these were all written by one person using various pseudonyms.
  There is no evidence to support such theories, of course, but hey - since when do liberals need evidence?
  And of course, as the theory of nuclear deterrence ordains, India and Pakistan, being nuclear powers, would never go to war again.
  Synonyms
  opinion, point of view, viewpoint, belief, judgement, reckoning, way of thinking, thinking, thought, notion, idea, conviction, persuasion, attitude, feeling, sentiment, impression, concept, conception, hypothesis, thesis, estimate, estimation, conclusion, verdict
3. 1.3Mathematics A collection of propositions to illustrate the principles of a subject.
  Example sentencesExamples
  This restriction makes the subject very different from the knot theory traditionally studied by mathematicians.
  However he made many contributions to number theory and to the theory of equations.
  Goldbach also studied infinite sums, the theory of curves and the theory of equations.
  Bolzano's theories of mathematical infinity anticipated Georg Cantor's theory of infinite sets.
  His mathematical work covered Cartesian geometry and the theory of equations.
  In particular he strongly criticised Cantor's and Dedekind's theories of irrational numbers.

Phrases

in theory

Used in describing what is supposed to happen or be possible, usually with the implication that it does not in fact happen.
in theory, things can only get better; in practice, they may well become a lot worse
Example sentencesExamples
- These are ideas which are beautiful in theory but limp and bedraggled in practice.
- This concept, though brilliant in theory, is utterly, utterly painful in practice.
- However, although this sounds good in theory, in practice it never quite seems to work that way.
- In theory it may seem like a great idea but, in theory, so do so many ideas until they are put into practice.
- Working on Saturdays is always confusing because we start earlier and, in theory, end earlier.
- The software makes it possible, in theory, to see and manage files on any storage system or server.
- Radar also uses microwaves, so that in theory it would be possible to cook food by putting it at the focus of a radar dish.
- The Freedom of Information Act is, in theory, a way of ensuring that happens.
- The precautionary principle sounds good in theory, but in practice it is a nightmare.
- While in theory that's an admirable trait, in practice it's pretty uncomfortable.
Synonyms
in principle, on paper, in the abstract, all things being equal, in an ideal world

Origin

Late 16th century (denoting a mental scheme of something to be done): via late Latin from Greek theōria ‘contemplation, speculation’, from theōros ‘spectator’.

单词	theory
释义	Definition of theory in English: theory nounPlural theories ˈθɪəriˈθɪri 1A supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained. Darwin's theory of evolution Example sentencesExamples Do you think that Hume wanted a general theory of human nature to explain why human beings act, think, perceive and feel in all of the ways that we do? In geology, the theory of evolution could explain two agreed facts that had given the scriptural view of creation a hard time. Theories do not become facts; theories explain facts, and a well validated theory does not turn into something else; it remains a theory forever. Pope John Paul II has already explained that the theory of evolution is not irreconcilable with the creation doctrine. She neatly interweaves discussions of online behavior with social science theories that may explain some Internet phenomena. In 1915, with his theory of general relativity, Einstein extended this hypothesis to include gravitation. No general theory explaining breeding dispersal has yet been formalized, but two main hypotheses have emerged. Hypotheses and theories are generally based on objective inferences, unlike opinions, which are generally based on subjective influences. Objections to the general theory of evolution are presented in both Darwin's conclusion and glossary of terms. But bundle theory is supposed to explain the structure of things on a metaphysical, not scientific level. Social cognitive theory, ecological systems theory and cultural-historical theory have a contextual base. That was before he started questioning whether Darwin's theory of evolution fully explained life on earth. He is regarded as the founder of the general functionalist theory of the social system. Eventually Einstein's general relativity theory explained the phenomenon in terms of a distortion of the fabric of space by the Sun's gravity. In general, this theory attempts to explain when and how people adopt new behaviors. All makers of monolithic theories want their theories to explain everything, and they want them to be strong and relatively simple. No matter how hard we try to produce theories and hypotheses to explain the market, it will always prove to be unpredictable. Religious-mystical theories, biological theories and socio-historical theories explain the existence of the caste system. Instead, he now requires them to be able to explain the scientific theory of evolution. Evolutionary theories attempt to explain how the fact of evolution occurs. Synonyms hypothesis, thesis, conjecture, supposition, speculation, postulation, postulate, proposition, premise, surmise, assumption, presumption, presupposition, notion, guess, hunch, feeling, suspicion opinion, view, belief, thinking, thought(s), judgement, contention principles, ideas, concepts principled explanations laws philosophy, ideology, system of ideas, science 1.1 A set of principles on which the practice of an activity is based. a theory of education mass noun music theory Example sentencesExamples On the debit side it seems we don't always have the players with the required levels of skill to carry the theory into practice. In an interview with this magazine, he offered some of his best thinking on the theory and practice of managing knowledge. However, in both the Christian and the Islamic worlds, it was the theory, not the practice of music that held sway as an intellectual pursuit. But theory and practice never seem to square properly with each other. Cayley's book was written at a time when the rehabilitative theory and practice of prisons, parole and other measures were under attack from the right. Really good trainers know it's important to make you perform each task - but how many of them put the theory into practice? The author proposes that only through a knowledge of music theory and practice can one understand the origins of modern science. But they also learn the theory and practice of guerrilla warfare. The principles link theory and practice, they translate the theoretical positions into the language of military practice. Much is known about the biological effects of radiation, and the theory and practice of human radiation protection has been developed in a systematic way. What follows foregrounds just some of the implications of biomedicine for the theory and practice of public mental health. The journal provides a forum for the discussion of the theory and practice of drama and theatre education. And he was a rare example of a scholar who put his theories into practice, both inside and outside the classroom. His research spans economic history, methodology, and the theory and practice of interdisciplinarity. It was a residential programme which accepted successful applicants for two years of training in the theory of education and practice of teaching. Nowadays it's not so common for writers to put their theory into practice! If the argument of this essay is valid, then we face a major task of reassessment of much of the theory and practice of Christian spirituality. The problem is that it's a lot harder to put the theory into practice. Whatever it comes to be called, we know it as the discipline devoted to the theory and practice of writing and teaching writing. A simple theoretical construct underlies the theory and practice of counterinsurgency warfare. Synonyms doctrine, dogma, teaching, principle, ethic, creed, credo, thesis, ideology, idea, ideal, position 1.2 An idea used to account for a situation or justify a course of action. my theory would be that the place has been seriously mismanaged Example sentencesExamples He replied that polygenists in the United States had in fact used their theories to justify slavery. My theory, of course, is that these were all written by one person using various pseudonyms. Blake was beginning to develop a new theory to account for what seemed to be going on around him. And of course, as the theory of nuclear deterrence ordains, India and Pakistan, being nuclear powers, would never go to war again. And of course my personal theory on this is that women, who do childbirth after all, can handle a lot more pain. There are, officers say, five theories which could account for his death. Besides the miraculous escape, the theory also accounts for the waters flowing back to destroy the Pharaoh's army that chased Moses and the Jews. Of course, the theory is very attractive, and leads many medical doctors and public health officials to believe we should vaccinate more often and against many more diseases. In any case, much qualitative research entails the testing of theories in the course of the research process. That's only a theory, of course, but one which I'm willing to defend. The experts laugh at my theories of course until I point out that they help me manage and live with the pain. There are many theories about Vietnam of course. Those are wonderful theories and of course, no one can ever prove them right or wrong. Of course, the simplest theory is that he did so well because he was a very good swimmer! There is no evidence to support such theories, of course, but hey - since when do liberals need evidence? It may be that in a federal constitutional situation your theory is correct. He took a step towards me, his eyes searching, ‘I have my theories, of course.’ His theory does not adequately account for the dual powers of divine conflagration and divine grace. And of course there is the theory that the dinosaurs were wiped out by a mega-tsunami caused by an asteroid. I have no other proof than logic, and so far events have justified my theory. Synonyms opinion, point of view, viewpoint, belief, judgement, reckoning, way of thinking, thinking, thought, notion, idea, conviction, persuasion, attitude, feeling, sentiment, impression, concept, conception, hypothesis, thesis, estimate, estimation, conclusion, verdict 1.3Mathematics A collection of propositions to illustrate the principles of a subject. Example sentencesExamples Bolzano's theories of mathematical infinity anticipated Georg Cantor's theory of infinite sets. This restriction makes the subject very different from the knot theory traditionally studied by mathematicians. However he made many contributions to number theory and to the theory of equations. Goldbach also studied infinite sums, the theory of curves and the theory of equations. In particular he strongly criticised Cantor's and Dedekind's theories of irrational numbers. His mathematical work covered Cartesian geometry and the theory of equations. Phrases in theory Used in describing what is supposed to happen or be possible, usually with the implication that it does not in fact happen. in theory, things can only get better; in practice, they may well become a lot worse Example sentencesExamples The software makes it possible, in theory, to see and manage files on any storage system or server. The precautionary principle sounds good in theory, but in practice it is a nightmare. However, although this sounds good in theory, in practice it never quite seems to work that way. These are ideas which are beautiful in theory but limp and bedraggled in practice. Radar also uses microwaves, so that in theory it would be possible to cook food by putting it at the focus of a radar dish. In theory it may seem like a great idea but, in theory, so do so many ideas until they are put into practice. The Freedom of Information Act is, in theory, a way of ensuring that happens. Working on Saturdays is always confusing because we start earlier and, in theory, end earlier. This concept, though brilliant in theory, is utterly, utterly painful in practice. While in theory that's an admirable trait, in practice it's pretty uncomfortable. Synonyms in principle, on paper, in the abstract, all things being equal, in an ideal world Origin Late 16th century (denoting a mental scheme of something to be done): via late Latin from Greek theōria 'contemplation, speculation', from theōros 'spectator'. Rhymes beery, bleary, cheery, dearie, dreary, Dun Laoghaire, eerie, eyrie (US aerie), Kashmiri, leery, peri, praemunire, query, smeary, teary, weary noun.1 phr. Definition of theory in US English: theory nounˈTHirēˈθɪri 1A supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained. Darwin's theory of evolution Example sentencesExamples That was before he started questioning whether Darwin's theory of evolution fully explained life on earth. Pope John Paul II has already explained that the theory of evolution is not irreconcilable with the creation doctrine. No general theory explaining breeding dispersal has yet been formalized, but two main hypotheses have emerged. Instead, he now requires them to be able to explain the scientific theory of evolution. Objections to the general theory of evolution are presented in both Darwin's conclusion and glossary of terms. Evolutionary theories attempt to explain how the fact of evolution occurs. In general, this theory attempts to explain when and how people adopt new behaviors. Do you think that Hume wanted a general theory of human nature to explain why human beings act, think, perceive and feel in all of the ways that we do? Religious-mystical theories, biological theories and socio-historical theories explain the existence of the caste system. In 1915, with his theory of general relativity, Einstein extended this hypothesis to include gravitation. No matter how hard we try to produce theories and hypotheses to explain the market, it will always prove to be unpredictable. Hypotheses and theories are generally based on objective inferences, unlike opinions, which are generally based on subjective influences. In geology, the theory of evolution could explain two agreed facts that had given the scriptural view of creation a hard time. But bundle theory is supposed to explain the structure of things on a metaphysical, not scientific level. He is regarded as the founder of the general functionalist theory of the social system. Eventually Einstein's general relativity theory explained the phenomenon in terms of a distortion of the fabric of space by the Sun's gravity. She neatly interweaves discussions of online behavior with social science theories that may explain some Internet phenomena. All makers of monolithic theories want their theories to explain everything, and they want them to be strong and relatively simple. Theories do not become facts; theories explain facts, and a well validated theory does not turn into something else; it remains a theory forever. Social cognitive theory, ecological systems theory and cultural-historical theory have a contextual base. Synonyms hypothesis, thesis, conjecture, supposition, speculation, postulation, postulate, proposition, premise, surmise, assumption, presumption, presupposition, notion, guess, hunch, feeling, suspicion principles, ideas, concepts 1.1 A set of principles on which the practice of an activity is based. a theory of education music theory Example sentencesExamples Whatever it comes to be called, we know it as the discipline devoted to the theory and practice of writing and teaching writing. Cayley's book was written at a time when the rehabilitative theory and practice of prisons, parole and other measures were under attack from the right. The principles link theory and practice, they translate the theoretical positions into the language of military practice. His research spans economic history, methodology, and the theory and practice of interdisciplinarity. What follows foregrounds just some of the implications of biomedicine for the theory and practice of public mental health. On the debit side it seems we don't always have the players with the required levels of skill to carry the theory into practice. The author proposes that only through a knowledge of music theory and practice can one understand the origins of modern science. However, in both the Christian and the Islamic worlds, it was the theory, not the practice of music that held sway as an intellectual pursuit. But theory and practice never seem to square properly with each other. Really good trainers know it's important to make you perform each task - but how many of them put the theory into practice? In an interview with this magazine, he offered some of his best thinking on the theory and practice of managing knowledge. But they also learn the theory and practice of guerrilla warfare. The problem is that it's a lot harder to put the theory into practice. Nowadays it's not so common for writers to put their theory into practice! Much is known about the biological effects of radiation, and the theory and practice of human radiation protection has been developed in a systematic way. The journal provides a forum for the discussion of the theory and practice of drama and theatre education. It was a residential programme which accepted successful applicants for two years of training in the theory of education and practice of teaching. And he was a rare example of a scholar who put his theories into practice, both inside and outside the classroom. If the argument of this essay is valid, then we face a major task of reassessment of much of the theory and practice of Christian spirituality. A simple theoretical construct underlies the theory and practice of counterinsurgency warfare. Synonyms doctrine, dogma, teaching, principle, ethic, creed, credo, thesis, ideology, idea, ideal, position 1.2 An idea used to account for a situation or justify a course of action. my theory would be that the place has been seriously mismanaged Example sentencesExamples Blake was beginning to develop a new theory to account for what seemed to be going on around him. Of course, the simplest theory is that he did so well because he was a very good swimmer! His theory does not adequately account for the dual powers of divine conflagration and divine grace. Those are wonderful theories and of course, no one can ever prove them right or wrong. Besides the miraculous escape, the theory also accounts for the waters flowing back to destroy the Pharaoh's army that chased Moses and the Jews. There are, officers say, five theories which could account for his death. And of course my personal theory on this is that women, who do childbirth after all, can handle a lot more pain. There are many theories about Vietnam of course. He replied that polygenists in the United States had in fact used their theories to justify slavery. It may be that in a federal constitutional situation your theory is correct. That's only a theory, of course, but one which I'm willing to defend. And of course there is the theory that the dinosaurs were wiped out by a mega-tsunami caused by an asteroid. He took a step towards me, his eyes searching, ‘I have my theories, of course.’ The experts laugh at my theories of course until I point out that they help me manage and live with the pain. I have no other proof than logic, and so far events have justified my theory. Of course, the theory is very attractive, and leads many medical doctors and public health officials to believe we should vaccinate more often and against many more diseases. In any case, much qualitative research entails the testing of theories in the course of the research process. My theory, of course, is that these were all written by one person using various pseudonyms. There is no evidence to support such theories, of course, but hey - since when do liberals need evidence? And of course, as the theory of nuclear deterrence ordains, India and Pakistan, being nuclear powers, would never go to war again. Synonyms opinion, point of view, viewpoint, belief, judgement, reckoning, way of thinking, thinking, thought, notion, idea, conviction, persuasion, attitude, feeling, sentiment, impression, concept, conception, hypothesis, thesis, estimate, estimation, conclusion, verdict 1.3Mathematics A collection of propositions to illustrate the principles of a subject. Example sentencesExamples This restriction makes the subject very different from the knot theory traditionally studied by mathematicians. However he made many contributions to number theory and to the theory of equations. Goldbach also studied infinite sums, the theory of curves and the theory of equations. Bolzano's theories of mathematical infinity anticipated Georg Cantor's theory of infinite sets. His mathematical work covered Cartesian geometry and the theory of equations. In particular he strongly criticised Cantor's and Dedekind's theories of irrational numbers. Phrases in theory Used in describing what is supposed to happen or be possible, usually with the implication that it does not in fact happen. in theory, things can only get better; in practice, they may well become a lot worse Example sentencesExamples These are ideas which are beautiful in theory but limp and bedraggled in practice. This concept, though brilliant in theory, is utterly, utterly painful in practice. However, although this sounds good in theory, in practice it never quite seems to work that way. In theory it may seem like a great idea but, in theory, so do so many ideas until they are put into practice. Working on Saturdays is always confusing because we start earlier and, in theory, end earlier. The software makes it possible, in theory, to see and manage files on any storage system or server. Radar also uses microwaves, so that in theory it would be possible to cook food by putting it at the focus of a radar dish. The Freedom of Information Act is, in theory, a way of ensuring that happens. The precautionary principle sounds good in theory, but in practice it is a nightmare. While in theory that's an admirable trait, in practice it's pretty uncomfortable. Synonyms in principle, on paper, in the abstract, all things being equal, in an ideal world Origin Late 16th century (denoting a mental scheme of something to be done): via late Latin from Greek theōria ‘contemplation, speculation’, from theōros ‘spectator’. noun.1 phr.
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