vacuum.
A region of space that contains no matter.
Meaning & usage
A region of space that contains no matter.
The condition of rarefaction, or reduction of pressure below that of the atmosphere, in a vessel, such as the condenser of a steam engine, which is nearly exhausted of air or steam, etc.
a vacuum of 26 inches of mercury, or 13 pounds per square inch
Ellipsis of vacuum cleaner.
A spacetime having tensors of zero magnitude.
A ground state of a quantum field or of local spacetime, or more abstractly the lowest-energy state of a system.
A ground state of a quantum field or of local spacetime, or more abstractly the lowest-energy state of a system. A description of spacetime resulting from a particular compactification of spatial dimensions.
An emptiness in life created by a loss of a person who was close, or of an occupation.
An exercise in which one draws their abdomen towards the spine.
Where this word comes from
Borrowed from New Latin vacuum (“vacuum”), a subsense of Classical Latin vacuum (“empty space”), a substantivised form of vacuus (“empty”); related to vacāre (“to be empty”). The exercise sense comes from analogy to the sucking action of a vacuum cleaner.
To clean (something) with a vacuum cleaner.
To use a vacuum cleaner.
To optimise a database or database table by physically removing deleted tuples.
Where this word comes from
Borrowed from New Latin vacuum (“vacuum”), a subsense of Classical Latin vacuum (“empty space”), a substantivised form of vacuus (“empty”); related to vacāre (“to be empty”). The exercise sense comes from analogy to the sucking action of a vacuum cleaner.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.