Definition of vacuum in English:

vacuum

nounPlural vacuums, Plural vacua ˈvakjuːm

1A space entirely devoid of matter.
Example sentencesExamples
- The vacuum triggers dark energy to materialize into matter and radiation in another Big Bang, refreshing the cycle of expansion.
- Just as nature is said to abhor a vacuum, it abhors true altruism.
- A jet engine requires oxygen from the atmosphere for combustion, and so cannot operate in the vacuum of space.
- Operating in the near vacuum of space, ion engines shoot out the propellant gas much faster than the jet of a chemical rocket.
- Not only was the cosmos expanding, but a repulsive pressure within the vacuum of space was also causing the expansion to accelerate.
- He conceived of the Void as a vacuum, an infinite space in which moved an infinite number of atoms that made up Being.
- Radiation, for example, is the only method by which internal energy can be transferred through a vacuum.
- Cass is a physicist who wants the final confirmation of the theory by creating a perfect vacuum, the conditions under which the original Big Bang occurred.
- Dangers in the lunar environment include radiation, extreme temperatures, and the vacuum of space.
- The absence of light, a void, a vacuum, nothingness is so extraordinary that it can only be part of the pre-creation world.
- The expansion of helium into a vacuum corresponds to a significant change in entropy but to a trivial change in energy.
- A vacuum, which is not spatial, that is, a vacuum which does not even contain space, does not exist, and has never existed!
- In the near vacuum of space, they travel along together.
- He suggested that in the first split second after the beginning, the vacuum of the Universe existed in a highly energetic state, as allowed by the quantum rules, but unstable.
- One doesn't determine the temperature of a vacuum.
- They operate like any rocket engine in the vacuum of space, by propelling gases in one direction to create an opposite and equal force on the craft.
- Since by definition it contains no matter, the vacuum of space itself has NO temperature.
- In the old days of classical mechanics the idea of a vacuum was simple.
- I am curious as to exactly when scientists found out that space is a vacuum and not made up of ether?
- Studying the plasma, scientists could expose the fundamental nature of matter and the vacuum that permeates the cosmos.
Synonyms
empty space, emptiness, void, nothingness, vacuity, vacancy
rare voidness, nihility
1. 1.1 A space or container from which the air has been completely or partly removed.
  Example sentencesExamples
  He creates a vacuum in a glass container, and places one atom of carbon into it.
  The oxygen used by the lighted flame created the vacuum.
  The chamber was then put into a vacuum overnight to remove any remaining trace of organic solvent.
  After venting to release the vacuum, he removed the detector flange.
  The old lamps burned in groups of nine or ten, whilst the new were in pairs and instead of burning in the air the carbon was in a chamber in which there was a partial vacuum.
  The partial vacuum in the chamber will cause the instrument to register, say, 35,000 feet when it is, in fact, only a few hundred feet above sea level.
2. 1.2usually in singular A gap left by the loss, death, or departure of someone or something significant.
  the political vacuum left by the death of the Emperor
  Example sentencesExamples
  In such a vacuum of political criticism, one might expect national newspaper columnists to step in and make coherent remarks upon government policy.
  The Greens hope to exploit the resulting political vacuum to take over the " balance of power " in parliament.
  There can't be a moral vacuum at the heart of this.
  Because he has held the reins of power so tightly and for so long, there were predictions that his departure would leave a vacuum of power and generate chaos.
  We hope that this denomination will be faithful to God and will fill the spiritual vacuum left by liberalism.
  Parliamentary elections in 2001 were easy because in 1999 it was obvious that there was a political vacuum needing to be filled in the society.
  The political vacuum could be filled as early as Wednesday but leaders are prepared for much longer discussions if the rank and file throw out their recommendations.
  Perhaps the existential angst of one man is also meant as a reflection on the moral vacuum at the heart of a country partly known for its kidnapping, crime and corruption.
  In that sense, globalization has indeed created a huge spiritual vacuum.
  The Bill addresses a regulatory vacuum which exists at national and international levels.
  A political vacuum must be avoided at all costs.
  The resulting vacuum of leadership left space for new peace leaders.
  He is already looking ahead to other ideas to fill the vacuum which was created in Ripon when it lost 800 students and an estimated £4.5m a year from the city's economy.
  In rural Scotland the retiral of a sitting MP always creates a vacuum which other political parties rush to fill.
  There will not be a security vacuum in that area at any time.
  The loss of those 37,000 troops will create a power vacuum, as happened at the turn of the 19th century.
  The vacuum created by their departure was filled by the club's most committed supporters, who set about raising money and bringing the club back from the brink.
  A Council spokesman assured residents services would be unaffected by the political vacuum.
  The apparently spontaneous nature of the uprising has created a political vacuum which may be hard to fill.
  The vacuum created by his death 24 years back still remains unfilled.
  Synonyms
  gap, space, absence, lack, deficiency, blank, lacuna
2A vacuum cleaner.
Example sentencesExamples
- After the surface has dried, use a vacuum to remove the powder that is created by etching.
- Best for those with allergies or asthma, these vacuums contain filters to clean the air.
- Use a shop vacuum to remove all remaining dirt from the cracks to be filled.
- The noise of the vacuum was entirely drowned out by the undistinguishable howls and screams of some rock singer.
- A brush will remove some dust if you do not have a vacuum, but will also scatter dust around.
- Use the wand attachment on a vacuum to remove all dust.
- Distractions such as rattles, music, or even running a vacuum, washing machine, or blow-dryer may be amusing or comforting to your baby.
- A stump grinder was on hand, and two high-powered vacuums sucked up leaves.
- This is a combination stick and handheld (dust buster style) vacuum and is proving to be perfect for my small apartment.
- It would be another ten years before the electric vacuum, iron, and frying pan became available as consumer products.
Synonyms
vacuum cleaner
British informal vac
trademark Hoover

verbvacuums ˈvakjuːm

[with object]

Clean with a vacuum cleaner.
the room needs to be vacuumed
Example sentencesExamples
- I was sick of being the only one who vacuumed common areas, cleaned the bath and toilet or did a load of dishes without quibbling whether I'd eaten off them.
- How long can I ignore the fact that the living room hasn't been vacuumed all week?
- Make sure that the school is vacuumed and dusted regularly, that it's routinely treated by a pest control company, and that it's completely smoke free.
- Before washing, dust or vacuum walls to remove loose soil.
- Apparently while I've been at work my son has cleaned up the house, even vacuuming it!
- Sand slowly so you don't go through the veneer and vacuum frequently to remove dust.
- A truck comes and vacuums out the tanks every month.
- I was just finishing up vacuuming the living room, when the phone rang.
- Kids don't care if the room has been vacuumed and cleaned.
- I'm putting extra zeal into my scrubbing, dusting, vacuuming and cleaning.
- Next thing we know he'll be vacuuming the floor and dusting the shelves.
- You avoid vacuuming the house as long as possible because your dog is afraid of the vacuum cleaner.
- On Saturday he vacuumed and cleaned the kitchen.
- As she was vacuuming the floor and thinking about the trip, the phone rang.
- I was just vacuuming the floor when I found a knife between the kitchen bench and the computer desk.
- Harriet vacuumed the carpet and dusted the living room.
- If this is just a musty smell, then vacuuming it out and masking it with potpourri or airing it out for a while might help.
- Year in, year out, the display remained unchanged, though it was scrupulously vacuumed and dusted.
- The carpets were vacuumed and the bathroom was completely scrubbed clean.
- Most people believe that vacuuming the carpet is essential for the control of head lice.
Synonyms
vacuum-clean
British hoover

Phrases

in a vacuum

(of an activity or a problem to be considered) isolated from the normal context in which it can best be understood or assessed.
professional training cannot take place in a vacuum
Example sentencesExamples
- My point is that those comments were made in a certain historical era and not in a vacuum.
- After all, the governments don't operate in a vacuum, they are elected and supported by majorities.
- The problem is that an individual's work choices don't operate in a vacuum.
- We cannot exist in a vacuum, in isolation from what's happening in other parts of the world.
- Experts point out that illnesses do not occur in a vacuum but rather in the context of society.
- While the film may be primarily an artistic statement, it does not exist like so much art, in a vacuum, but is placed firmly in context.
- All this artistic and scientific activity did not, of course, take place in a vacuum.
- The important point is that politics does not operate in a vacuum.
- It wasn't as though the summit occurred in a vacuum without any prior events.
- But what we must remember is that the decision to hold elections did not emerge in a vacuum.

Origin

Mid 16th century: modern Latin, neuter of Latin vacuus 'empty'.

This modern Latin word is from Latin vacuus ‘empty’, a base shared by mid 17th-century vacuous meaning, in early examples, ‘empty of matter’. ‘Unintelligent’ became one of the word's meanings in the mid 19th century.

Definition of vacuum in US English:

vacuum

nounˈvækˌju(ə)mˈvakˌyo͞o(ə)m

1A space entirely devoid of matter.
Example sentencesExamples
- Studying the plasma, scientists could expose the fundamental nature of matter and the vacuum that permeates the cosmos.
- Operating in the near vacuum of space, ion engines shoot out the propellant gas much faster than the jet of a chemical rocket.
- He suggested that in the first split second after the beginning, the vacuum of the Universe existed in a highly energetic state, as allowed by the quantum rules, but unstable.
- A jet engine requires oxygen from the atmosphere for combustion, and so cannot operate in the vacuum of space.
- One doesn't determine the temperature of a vacuum.
- The vacuum triggers dark energy to materialize into matter and radiation in another Big Bang, refreshing the cycle of expansion.
- They operate like any rocket engine in the vacuum of space, by propelling gases in one direction to create an opposite and equal force on the craft.
- In the near vacuum of space, they travel along together.
- He conceived of the Void as a vacuum, an infinite space in which moved an infinite number of atoms that made up Being.
- The absence of light, a void, a vacuum, nothingness is so extraordinary that it can only be part of the pre-creation world.
- Dangers in the lunar environment include radiation, extreme temperatures, and the vacuum of space.
- In the old days of classical mechanics the idea of a vacuum was simple.
- Not only was the cosmos expanding, but a repulsive pressure within the vacuum of space was also causing the expansion to accelerate.
- Just as nature is said to abhor a vacuum, it abhors true altruism.
- Cass is a physicist who wants the final confirmation of the theory by creating a perfect vacuum, the conditions under which the original Big Bang occurred.
- The expansion of helium into a vacuum corresponds to a significant change in entropy but to a trivial change in energy.
- I am curious as to exactly when scientists found out that space is a vacuum and not made up of ether?
- Radiation, for example, is the only method by which internal energy can be transferred through a vacuum.
- A vacuum, which is not spatial, that is, a vacuum which does not even contain space, does not exist, and has never existed!
- Since by definition it contains no matter, the vacuum of space itself has NO temperature.
Synonyms
empty space, emptiness, void, nothingness, vacuity, vacancy
1. 1.1 A space or container from which the air has been completely or partly removed.
  Example sentencesExamples
  The partial vacuum in the chamber will cause the instrument to register, say, 35,000 feet when it is, in fact, only a few hundred feet above sea level.
  The oxygen used by the lighted flame created the vacuum.
  The old lamps burned in groups of nine or ten, whilst the new were in pairs and instead of burning in the air the carbon was in a chamber in which there was a partial vacuum.
  The chamber was then put into a vacuum overnight to remove any remaining trace of organic solvent.
  He creates a vacuum in a glass container, and places one atom of carbon into it.
  After venting to release the vacuum, he removed the detector flange.
2. 1.2usually in singular A gap left by the loss, death, or departure of someone or something formerly playing a significant part in a situation or activity.
  the political vacuum left by the death of the Emperor
  Example sentencesExamples
  Because he has held the reins of power so tightly and for so long, there were predictions that his departure would leave a vacuum of power and generate chaos.
  The apparently spontaneous nature of the uprising has created a political vacuum which may be hard to fill.
  He is already looking ahead to other ideas to fill the vacuum which was created in Ripon when it lost 800 students and an estimated £4.5m a year from the city's economy.
  The vacuum created by his death 24 years back still remains unfilled.
  The Greens hope to exploit the resulting political vacuum to take over the " balance of power " in parliament.
  Perhaps the existential angst of one man is also meant as a reflection on the moral vacuum at the heart of a country partly known for its kidnapping, crime and corruption.
  There will not be a security vacuum in that area at any time.
  We hope that this denomination will be faithful to God and will fill the spiritual vacuum left by liberalism.
  In that sense, globalization has indeed created a huge spiritual vacuum.
  The resulting vacuum of leadership left space for new peace leaders.
  There can't be a moral vacuum at the heart of this.
  The political vacuum could be filled as early as Wednesday but leaders are prepared for much longer discussions if the rank and file throw out their recommendations.
  A political vacuum must be avoided at all costs.
  In such a vacuum of political criticism, one might expect national newspaper columnists to step in and make coherent remarks upon government policy.
  The loss of those 37,000 troops will create a power vacuum, as happened at the turn of the 19th century.
  A Council spokesman assured residents services would be unaffected by the political vacuum.
  In rural Scotland the retiral of a sitting MP always creates a vacuum which other political parties rush to fill.
  Parliamentary elections in 2001 were easy because in 1999 it was obvious that there was a political vacuum needing to be filled in the society.
  The vacuum created by their departure was filled by the club's most committed supporters, who set about raising money and bringing the club back from the brink.
  The Bill addresses a regulatory vacuum which exists at national and international levels.
  Synonyms
  gap, space, absence, lack, deficiency, blank, lacuna
2A vacuum cleaner.
Example sentencesExamples
- Best for those with allergies or asthma, these vacuums contain filters to clean the air.
- A brush will remove some dust if you do not have a vacuum, but will also scatter dust around.
- Use the wand attachment on a vacuum to remove all dust.
- After the surface has dried, use a vacuum to remove the powder that is created by etching.
- This is a combination stick and handheld (dust buster style) vacuum and is proving to be perfect for my small apartment.
- It would be another ten years before the electric vacuum, iron, and frying pan became available as consumer products.
- Use a shop vacuum to remove all remaining dirt from the cracks to be filled.
- The noise of the vacuum was entirely drowned out by the undistinguishable howls and screams of some rock singer.
- Distractions such as rattles, music, or even running a vacuum, washing machine, or blow-dryer may be amusing or comforting to your baby.
- A stump grinder was on hand, and two high-powered vacuums sucked up leaves.
Synonyms
vacuum cleaner

verbˈvækˌju(ə)mˈvakˌyo͞o(ə)m

[with object]

Clean with a vacuum cleaner.
the room needs to be vacuumed
Example sentencesExamples
- As she was vacuuming the floor and thinking about the trip, the phone rang.
- Harriet vacuumed the carpet and dusted the living room.
- The carpets were vacuumed and the bathroom was completely scrubbed clean.
- Before washing, dust or vacuum walls to remove loose soil.
- I'm putting extra zeal into my scrubbing, dusting, vacuuming and cleaning.
- You avoid vacuuming the house as long as possible because your dog is afraid of the vacuum cleaner.
- A truck comes and vacuums out the tanks every month.
- Kids don't care if the room has been vacuumed and cleaned.
- Next thing we know he'll be vacuuming the floor and dusting the shelves.
- Make sure that the school is vacuumed and dusted regularly, that it's routinely treated by a pest control company, and that it's completely smoke free.
- I was just vacuuming the floor when I found a knife between the kitchen bench and the computer desk.
- Apparently while I've been at work my son has cleaned up the house, even vacuuming it!
- Sand slowly so you don't go through the veneer and vacuum frequently to remove dust.
- How long can I ignore the fact that the living room hasn't been vacuumed all week?
- I was sick of being the only one who vacuumed common areas, cleaned the bath and toilet or did a load of dishes without quibbling whether I'd eaten off them.
- On Saturday he vacuumed and cleaned the kitchen.
- I was just finishing up vacuuming the living room, when the phone rang.
- Most people believe that vacuuming the carpet is essential for the control of head lice.
- If this is just a musty smell, then vacuuming it out and masking it with potpourri or airing it out for a while might help.
- Year in, year out, the display remained unchanged, though it was scrupulously vacuumed and dusted.
Synonyms
vacuum-clean

Phrases

in a vacuum

(of an activity or a problem to be considered) isolated from the context normal to it and in which it can best be understood or assessed.
Example sentencesExamples
- It wasn't as though the summit occurred in a vacuum without any prior events.
- Experts point out that illnesses do not occur in a vacuum but rather in the context of society.
- We cannot exist in a vacuum, in isolation from what's happening in other parts of the world.
- The problem is that an individual's work choices don't operate in a vacuum.
- My point is that those comments were made in a certain historical era and not in a vacuum.
- The important point is that politics does not operate in a vacuum.
- After all, the governments don't operate in a vacuum, they are elected and supported by majorities.
- While the film may be primarily an artistic statement, it does not exist like so much art, in a vacuum, but is placed firmly in context.
- But what we must remember is that the decision to hold elections did not emerge in a vacuum.
- All this artistic and scientific activity did not, of course, take place in a vacuum.

Origin

Mid 16th century: modern Latin, neuter of Latin vacuus ‘empty’.

单词	vacuum
释义	Definition of vacuum in English: vacuum nounPlural vacuums, Plural vacua ˈvakjuːm 1A space entirely devoid of matter. Example sentencesExamples The vacuum triggers dark energy to materialize into matter and radiation in another Big Bang, refreshing the cycle of expansion. Just as nature is said to abhor a vacuum, it abhors true altruism. A jet engine requires oxygen from the atmosphere for combustion, and so cannot operate in the vacuum of space. Operating in the near vacuum of space, ion engines shoot out the propellant gas much faster than the jet of a chemical rocket. Not only was the cosmos expanding, but a repulsive pressure within the vacuum of space was also causing the expansion to accelerate. He conceived of the Void as a vacuum, an infinite space in which moved an infinite number of atoms that made up Being. Radiation, for example, is the only method by which internal energy can be transferred through a vacuum. Cass is a physicist who wants the final confirmation of the theory by creating a perfect vacuum, the conditions under which the original Big Bang occurred. Dangers in the lunar environment include radiation, extreme temperatures, and the vacuum of space. The absence of light, a void, a vacuum, nothingness is so extraordinary that it can only be part of the pre-creation world. The expansion of helium into a vacuum corresponds to a significant change in entropy but to a trivial change in energy. A vacuum, which is not spatial, that is, a vacuum which does not even contain space, does not exist, and has never existed! In the near vacuum of space, they travel along together. He suggested that in the first split second after the beginning, the vacuum of the Universe existed in a highly energetic state, as allowed by the quantum rules, but unstable. One doesn't determine the temperature of a vacuum. They operate like any rocket engine in the vacuum of space, by propelling gases in one direction to create an opposite and equal force on the craft. Since by definition it contains no matter, the vacuum of space itself has NO temperature. In the old days of classical mechanics the idea of a vacuum was simple. I am curious as to exactly when scientists found out that space is a vacuum and not made up of ether? Studying the plasma, scientists could expose the fundamental nature of matter and the vacuum that permeates the cosmos. Synonyms empty space, emptiness, void, nothingness, vacuity, vacancy rare voidness, nihility 1.1 A space or container from which the air has been completely or partly removed. Example sentencesExamples He creates a vacuum in a glass container, and places one atom of carbon into it. The oxygen used by the lighted flame created the vacuum. The chamber was then put into a vacuum overnight to remove any remaining trace of organic solvent. After venting to release the vacuum, he removed the detector flange. The old lamps burned in groups of nine or ten, whilst the new were in pairs and instead of burning in the air the carbon was in a chamber in which there was a partial vacuum. The partial vacuum in the chamber will cause the instrument to register, say, 35,000 feet when it is, in fact, only a few hundred feet above sea level. 1.2usually in singular A gap left by the loss, death, or departure of someone or something significant. the political vacuum left by the death of the Emperor Example sentencesExamples In such a vacuum of political criticism, one might expect national newspaper columnists to step in and make coherent remarks upon government policy. The Greens hope to exploit the resulting political vacuum to take over the " balance of power " in parliament. There can't be a moral vacuum at the heart of this. Because he has held the reins of power so tightly and for so long, there were predictions that his departure would leave a vacuum of power and generate chaos. We hope that this denomination will be faithful to God and will fill the spiritual vacuum left by liberalism. Parliamentary elections in 2001 were easy because in 1999 it was obvious that there was a political vacuum needing to be filled in the society. The political vacuum could be filled as early as Wednesday but leaders are prepared for much longer discussions if the rank and file throw out their recommendations. Perhaps the existential angst of one man is also meant as a reflection on the moral vacuum at the heart of a country partly known for its kidnapping, crime and corruption. In that sense, globalization has indeed created a huge spiritual vacuum. The Bill addresses a regulatory vacuum which exists at national and international levels. A political vacuum must be avoided at all costs. The resulting vacuum of leadership left space for new peace leaders. He is already looking ahead to other ideas to fill the vacuum which was created in Ripon when it lost 800 students and an estimated £4.5m a year from the city's economy. In rural Scotland the retiral of a sitting MP always creates a vacuum which other political parties rush to fill. There will not be a security vacuum in that area at any time. The loss of those 37,000 troops will create a power vacuum, as happened at the turn of the 19th century. The vacuum created by their departure was filled by the club's most committed supporters, who set about raising money and bringing the club back from the brink. A Council spokesman assured residents services would be unaffected by the political vacuum. The apparently spontaneous nature of the uprising has created a political vacuum which may be hard to fill. The vacuum created by his death 24 years back still remains unfilled. Synonyms gap, space, absence, lack, deficiency, blank, lacuna 2A vacuum cleaner. Example sentencesExamples After the surface has dried, use a vacuum to remove the powder that is created by etching. Best for those with allergies or asthma, these vacuums contain filters to clean the air. Use a shop vacuum to remove all remaining dirt from the cracks to be filled. The noise of the vacuum was entirely drowned out by the undistinguishable howls and screams of some rock singer. A brush will remove some dust if you do not have a vacuum, but will also scatter dust around. Use the wand attachment on a vacuum to remove all dust. Distractions such as rattles, music, or even running a vacuum, washing machine, or blow-dryer may be amusing or comforting to your baby. A stump grinder was on hand, and two high-powered vacuums sucked up leaves. This is a combination stick and handheld (dust buster style) vacuum and is proving to be perfect for my small apartment. It would be another ten years before the electric vacuum, iron, and frying pan became available as consumer products. Synonyms vacuum cleaner British informal vac trademark Hoover verbvacuums ˈvakjuːm [with object] Clean with a vacuum cleaner. the room needs to be vacuumed Example sentencesExamples I was sick of being the only one who vacuumed common areas, cleaned the bath and toilet or did a load of dishes without quibbling whether I'd eaten off them. How long can I ignore the fact that the living room hasn't been vacuumed all week? Make sure that the school is vacuumed and dusted regularly, that it's routinely treated by a pest control company, and that it's completely smoke free. Before washing, dust or vacuum walls to remove loose soil. Apparently while I've been at work my son has cleaned up the house, even vacuuming it! Sand slowly so you don't go through the veneer and vacuum frequently to remove dust. A truck comes and vacuums out the tanks every month. I was just finishing up vacuuming the living room, when the phone rang. Kids don't care if the room has been vacuumed and cleaned. I'm putting extra zeal into my scrubbing, dusting, vacuuming and cleaning. Next thing we know he'll be vacuuming the floor and dusting the shelves. You avoid vacuuming the house as long as possible because your dog is afraid of the vacuum cleaner. On Saturday he vacuumed and cleaned the kitchen. As she was vacuuming the floor and thinking about the trip, the phone rang. I was just vacuuming the floor when I found a knife between the kitchen bench and the computer desk. Harriet vacuumed the carpet and dusted the living room. If this is just a musty smell, then vacuuming it out and masking it with potpourri or airing it out for a while might help. Year in, year out, the display remained unchanged, though it was scrupulously vacuumed and dusted. The carpets were vacuumed and the bathroom was completely scrubbed clean. Most people believe that vacuuming the carpet is essential for the control of head lice. Synonyms vacuum-clean British hoover Phrases in a vacuum (of an activity or a problem to be considered) isolated from the normal context in which it can best be understood or assessed. professional training cannot take place in a vacuum Example sentencesExamples My point is that those comments were made in a certain historical era and not in a vacuum. After all, the governments don't operate in a vacuum, they are elected and supported by majorities. The problem is that an individual's work choices don't operate in a vacuum. We cannot exist in a vacuum, in isolation from what's happening in other parts of the world. Experts point out that illnesses do not occur in a vacuum but rather in the context of society. While the film may be primarily an artistic statement, it does not exist like so much art, in a vacuum, but is placed firmly in context. All this artistic and scientific activity did not, of course, take place in a vacuum. The important point is that politics does not operate in a vacuum. It wasn't as though the summit occurred in a vacuum without any prior events. But what we must remember is that the decision to hold elections did not emerge in a vacuum. Origin Mid 16th century: modern Latin, neuter of Latin vacuus 'empty'. This modern Latin word is from Latin vacuus ‘empty’, a base shared by mid 17th-century vacuous meaning, in early examples, ‘empty of matter’. ‘Unintelligent’ became one of the word's meanings in the mid 19th century. noun.1 phr. Definition of vacuum in US English: vacuum nounˈvækˌju(ə)mˈvakˌyo͞o(ə)m 1A space entirely devoid of matter. Example sentencesExamples Studying the plasma, scientists could expose the fundamental nature of matter and the vacuum that permeates the cosmos. Operating in the near vacuum of space, ion engines shoot out the propellant gas much faster than the jet of a chemical rocket. He suggested that in the first split second after the beginning, the vacuum of the Universe existed in a highly energetic state, as allowed by the quantum rules, but unstable. A jet engine requires oxygen from the atmosphere for combustion, and so cannot operate in the vacuum of space. One doesn't determine the temperature of a vacuum. The vacuum triggers dark energy to materialize into matter and radiation in another Big Bang, refreshing the cycle of expansion. They operate like any rocket engine in the vacuum of space, by propelling gases in one direction to create an opposite and equal force on the craft. In the near vacuum of space, they travel along together. He conceived of the Void as a vacuum, an infinite space in which moved an infinite number of atoms that made up Being. The absence of light, a void, a vacuum, nothingness is so extraordinary that it can only be part of the pre-creation world. Dangers in the lunar environment include radiation, extreme temperatures, and the vacuum of space. In the old days of classical mechanics the idea of a vacuum was simple. Not only was the cosmos expanding, but a repulsive pressure within the vacuum of space was also causing the expansion to accelerate. Just as nature is said to abhor a vacuum, it abhors true altruism. Cass is a physicist who wants the final confirmation of the theory by creating a perfect vacuum, the conditions under which the original Big Bang occurred. The expansion of helium into a vacuum corresponds to a significant change in entropy but to a trivial change in energy. I am curious as to exactly when scientists found out that space is a vacuum and not made up of ether? Radiation, for example, is the only method by which internal energy can be transferred through a vacuum. A vacuum, which is not spatial, that is, a vacuum which does not even contain space, does not exist, and has never existed! Since by definition it contains no matter, the vacuum of space itself has NO temperature. Synonyms empty space, emptiness, void, nothingness, vacuity, vacancy 1.1 A space or container from which the air has been completely or partly removed. Example sentencesExamples The partial vacuum in the chamber will cause the instrument to register, say, 35,000 feet when it is, in fact, only a few hundred feet above sea level. The oxygen used by the lighted flame created the vacuum. The old lamps burned in groups of nine or ten, whilst the new were in pairs and instead of burning in the air the carbon was in a chamber in which there was a partial vacuum. The chamber was then put into a vacuum overnight to remove any remaining trace of organic solvent. He creates a vacuum in a glass container, and places one atom of carbon into it. After venting to release the vacuum, he removed the detector flange. 1.2usually in singular A gap left by the loss, death, or departure of someone or something formerly playing a significant part in a situation or activity. the political vacuum left by the death of the Emperor Example sentencesExamples Because he has held the reins of power so tightly and for so long, there were predictions that his departure would leave a vacuum of power and generate chaos. The apparently spontaneous nature of the uprising has created a political vacuum which may be hard to fill. He is already looking ahead to other ideas to fill the vacuum which was created in Ripon when it lost 800 students and an estimated £4.5m a year from the city's economy. The vacuum created by his death 24 years back still remains unfilled. The Greens hope to exploit the resulting political vacuum to take over the " balance of power " in parliament. Perhaps the existential angst of one man is also meant as a reflection on the moral vacuum at the heart of a country partly known for its kidnapping, crime and corruption. There will not be a security vacuum in that area at any time. We hope that this denomination will be faithful to God and will fill the spiritual vacuum left by liberalism. In that sense, globalization has indeed created a huge spiritual vacuum. The resulting vacuum of leadership left space for new peace leaders. There can't be a moral vacuum at the heart of this. The political vacuum could be filled as early as Wednesday but leaders are prepared for much longer discussions if the rank and file throw out their recommendations. A political vacuum must be avoided at all costs. In such a vacuum of political criticism, one might expect national newspaper columnists to step in and make coherent remarks upon government policy. The loss of those 37,000 troops will create a power vacuum, as happened at the turn of the 19th century. A Council spokesman assured residents services would be unaffected by the political vacuum. In rural Scotland the retiral of a sitting MP always creates a vacuum which other political parties rush to fill. Parliamentary elections in 2001 were easy because in 1999 it was obvious that there was a political vacuum needing to be filled in the society. The vacuum created by their departure was filled by the club's most committed supporters, who set about raising money and bringing the club back from the brink. The Bill addresses a regulatory vacuum which exists at national and international levels. Synonyms gap, space, absence, lack, deficiency, blank, lacuna 2A vacuum cleaner. Example sentencesExamples Best for those with allergies or asthma, these vacuums contain filters to clean the air. A brush will remove some dust if you do not have a vacuum, but will also scatter dust around. Use the wand attachment on a vacuum to remove all dust. After the surface has dried, use a vacuum to remove the powder that is created by etching. This is a combination stick and handheld (dust buster style) vacuum and is proving to be perfect for my small apartment. It would be another ten years before the electric vacuum, iron, and frying pan became available as consumer products. Use a shop vacuum to remove all remaining dirt from the cracks to be filled. The noise of the vacuum was entirely drowned out by the undistinguishable howls and screams of some rock singer. Distractions such as rattles, music, or even running a vacuum, washing machine, or blow-dryer may be amusing or comforting to your baby. A stump grinder was on hand, and two high-powered vacuums sucked up leaves. Synonyms vacuum cleaner verbˈvækˌju(ə)mˈvakˌyo͞o(ə)m [with object] Clean with a vacuum cleaner. the room needs to be vacuumed Example sentencesExamples As she was vacuuming the floor and thinking about the trip, the phone rang. Harriet vacuumed the carpet and dusted the living room. The carpets were vacuumed and the bathroom was completely scrubbed clean. Before washing, dust or vacuum walls to remove loose soil. I'm putting extra zeal into my scrubbing, dusting, vacuuming and cleaning. You avoid vacuuming the house as long as possible because your dog is afraid of the vacuum cleaner. A truck comes and vacuums out the tanks every month. Kids don't care if the room has been vacuumed and cleaned. Next thing we know he'll be vacuuming the floor and dusting the shelves. Make sure that the school is vacuumed and dusted regularly, that it's routinely treated by a pest control company, and that it's completely smoke free. I was just vacuuming the floor when I found a knife between the kitchen bench and the computer desk. Apparently while I've been at work my son has cleaned up the house, even vacuuming it! Sand slowly so you don't go through the veneer and vacuum frequently to remove dust. How long can I ignore the fact that the living room hasn't been vacuumed all week? I was sick of being the only one who vacuumed common areas, cleaned the bath and toilet or did a load of dishes without quibbling whether I'd eaten off them. On Saturday he vacuumed and cleaned the kitchen. I was just finishing up vacuuming the living room, when the phone rang. Most people believe that vacuuming the carpet is essential for the control of head lice. If this is just a musty smell, then vacuuming it out and masking it with potpourri or airing it out for a while might help. Year in, year out, the display remained unchanged, though it was scrupulously vacuumed and dusted. Synonyms vacuum-clean Phrases in a vacuum (of an activity or a problem to be considered) isolated from the context normal to it and in which it can best be understood or assessed. Example sentencesExamples It wasn't as though the summit occurred in a vacuum without any prior events. Experts point out that illnesses do not occur in a vacuum but rather in the context of society. We cannot exist in a vacuum, in isolation from what's happening in other parts of the world. The problem is that an individual's work choices don't operate in a vacuum. My point is that those comments were made in a certain historical era and not in a vacuum. The important point is that politics does not operate in a vacuum. After all, the governments don't operate in a vacuum, they are elected and supported by majorities. While the film may be primarily an artistic statement, it does not exist like so much art, in a vacuum, but is placed firmly in context. But what we must remember is that the decision to hold elections did not emerge in a vacuum. All this artistic and scientific activity did not, of course, take place in a vacuum. Origin Mid 16th century: modern Latin, neuter of Latin vacuus ‘empty’. noun.1 phr.
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