| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024the•o•ry /ˈθiəri, ˈθɪri/USA pronunciation n., pl. -ries. - Science. a group or collection of general statements that together as principles explain some fact or group of facts:[countable]Darwin's theory of evolution; quantum theory in physics.
- Mathematics a body or collection of mathematical principles belonging to one subject:[uncountable]the study of number theory.
- the branch of a science or art that deals with its principles or methods, as distinguished from its practice:[uncountable]He took courses in music theory.
- an explanation for some fact or behavior claimed to be true but not yet proven:[countable]He has a theory about why so many students have trouble with the word the in English.
Idioms- Idioms in theory, under ideal conditions;
theoretically:In theory everyone has certain equal rights.
WordReference Random House Unabridged Dictionary of American English © 2024the•o•ry (thē′ə rē, thēr′ē),USA pronunciation n., pl. -ries. - a coherent group of general propositions used as principles of explanation for a class of phenomena:Einstein's theory of relativity.
- a proposed explanation whose status is still conjectural, in contrast to well-established propositions that are regarded as reporting matters of actual fact.
- Mathematicsa body of principles, theorems, or the like, belonging to one subject:number theory.
- the branch of a science or art that deals with its principles or methods, as distinguished from its practice:music theory.
- a particular conception or view of something to be done or of the method of doing it;
a system of rules or principles. - contemplation or speculation.
- guess or conjecture.
- Greek theōría a viewing, contemplating, equivalent. to theōr(eîn) to view + -ia -y3
- Late Latin theōria
- 1590–1600
- 1.See corresponding entry in Unabridged Theory, hypothesis are used in non-technical contexts to mean an untested idea or opinion. A theory in technical use is a more or less verified or established explanation accounting for known facts or phenomena:the theory of relativity.A hypothesis is a conjecture put forth as a possible explanation of phenomena or relations, which serves as a basis of argument or experimentation to reach the truth:This idea is only a hypothesis.
Collins Concise English Dictionary © HarperCollins Publishers:: theory /ˈθɪərɪ/ n ( pl -ries)- a system of rules, procedures, and assumptions used to produce a result
- abstract knowledge or reasoning
- a speculative or conjectural view or idea: I have a theory about that
- an ideal or hypothetical situation (esp in the phrase in theory)
- a set of hypotheses related by logical or mathematical arguments to explain and predict a wide variety of connected phenomena in general terms: the theory of relativity
- a nontechnical name for hypothesis
Etymology: 16th Century: from Late Latin theōria, from Greek: a sight, from theōrein to gaze upon |