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1. (n.) vacuum
a space entirely devoid of matter.
2. vacuum
an enclosed space from which matter, esp. air, has been partially removed so that the matter or gas remaining in the space exerts less pressure than the atmosphere (opposed to plenum).
3. vacuum
the state or degree of exhaustion in such an enclosed space.
4. vacuum
a space not filled or occupied; emptiness; void:
The loss left a vacuum in his life.
5. (adj.) vacuum
of, pertaining to, employing, or producing a vacuum.
6. vacuum
(of a hollow container) partly exhausted of gas or air.
7. vacuum
noting or pertaining to canning or packaging in which air is removed from the container to prevent deterioration of the contents.
8. (v.t.) vacuum
to clean with a vacuum cleaner.
9. (v.i.) vacuum
to use a vacuum cleaner.
Etymology: (1540–50; < L, neut. of vacuus empty)
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| Definition of 'vacuum' |
Princeton's WordNet |
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1. (noun) vacuum, vacuity
the absence of matter
2. (noun) void, vacancy, emptiness, vacuum
an empty area or space
"the huge desert voids"; "the emptiness of outer space"; "without their support he'll be ruling in a vacuum"
3. (noun) vacuum, vacuity
a region that is devoid of matter
4. (verb) vacuum, vacuum cleaner
an electrical home appliance that cleans by suction
5. (verb) vacuum, vacuum-clean, hoover
clean with a vacuum cleaner
"vacuum the carpets"
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1. (noun) vacuum
a machine used to clean floors
2. vacuum
a space from which all air and other substances have been removed
to create a vacuum
3. (verb) vacuum
to clean using a vacuum
Did you vacuum the hall?
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| Definition of 'vacuum' |
Webster Dictionary |
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1. (noun) vacuum
a space entirely devoid of matter (called also, by way of distinction, absolute vacuum); hence, in a more general sense, a space, as the interior of a closed vessel, which has been exhausted to a high or the highest degree by an air pump or other artificial means; as, water boils at a reduced temperature in a vacuum
2. (noun) vacuum
the condition of rarefaction, or reduction of pressure below that of the atmosphere, in a vessel, as the condenser of a steam engine, which is nearly exhausted of air or steam, etc.; as, a vacuum of 26 inches of mercury, or 13 pounds per square inch
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| Definition of 'vacuum' |
U.S. National Library of Medicine |
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1. vacuum
A space in which the pressure is far below atmospheric pressure so that the remaining gases do not affect processes being carried on in the space.
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| Definition of 'vacuum' |
The Standard Electrical Dictionary |
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1. vacuum
A space destitute of any substance. The great pervading substance is in general sense the atmosphere. It is the gaseous mixture which surrounds and envelopes the earth and its inhabitants. It consists of a simple mixture of oxygen, 1 part, nitrogen, 4 parts, with 4 to 6 volumes of carbonic acid gas in 10,000 volumes of air, or about one cubic inch to one cubic foot. It presses with a force of about 14.7 lbs. per square inch under the influence of the force of gravity. The term vacuum in practise refers to any space from which air has been removed. It may be produced chemically. Air may be displaced by carbonic acid gas and the latter may be absorbed by caustic alkali or other chemical. The air may be expelled and the space may be filled with steam which is condensed to produce the vacuum. Of course in all cases the space must be included in an hermetically sealed vessel, such as the bulb of an incandescent lamp. But the universal method of producing a vacuum is by air pumps. An absolute vacuum means the entire absence of gas or air, something almost impossible to produce. A high vacuum is sometimes understood to mean one in which the path of the molecules is equal in length to the diameter of the containing vessels, as in Crookes' Radiometer and other apparatus for illustrating the radiant condition of matter. The air left after exhaustion is termed residual air or residual atmosphere.
[Transcriber's note: Dry air is about .78 nitrogen, .21 oxygen, .01 argon, .00038 carbon dioxide, and trace amounts of other gases. Argon was suspected by Henry Cavendish in 1785. It was discovered in 1894 by Lord Rayleigh and Sir William Ramsay.]
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Sense: a space from which (almost) all air or other gas has been removed.
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 Afrikaans: vakuum |
 Arabic: خَواء، فَراغ |
 Bulgarian: вакуум |
 Brazilian: vácuo |
 Czech: vzduchoprázdno |
 German: das Vakuum |
 Danish: lufttomt rum; vakuum |
 Greek: κενό αέρος |
 Spanish: vacío |
 Estonian: vaakum |
 Farsi: خلاء |
 Finnish: tyhjiö |
 French: vide |
 Hebrew: ריק |
 Hindi: शून्य स्थान |
 Croatian: vakum |
 Hungarian: vákuum |
 Indonesian: ruang hampa udara |
 Icelandic: lofttæmi |
 Italian: vuoto |
 Japanese: 真空 |
 Korean: 진공 |
 Lithuanian: vakuumas |
 Latvian: vakuums |
 Malay: hampa gas; vakum |
 Dutch: vacuüm |
 Norwegian: lufttomt rom, vakuum |
 Polish: próżnia |
 Portuguese: vácuo |
 Romanian: vid |
 Russian: вакуум |
 Slovak: vzduchoprázdno |
 Slovenian: vakuum |
 Serbian: vakuum |
 Swedish: vakuum |
 Thai: สุญญากาศ |
 Turkish: boşluk, vakum |
 Taiwanese: 真空 |
 Ukrainian: вакуум |
 Urdu: ہوا سے خالي جگہ، خلا |
 Vietnamese: chân không |
 Chinese: 真空 |
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Definitions of vacuum 
