vacuum

/ˈvæ.kjuː.əm/

IPA: /V AE1 K Y UW0 M/

noun

1
A region of space that contains no matter.
2
(plural only "vacuums") A vacuum cleaner.
3
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”
4
A spacetime having tensors of zero magnitude

Synonyms

Antonyms

verb

1
To clean (something) with a vacuum cleaner.
2
To use a vacuum cleaner.
3
To optimise a database or database table by physically removing deleted tuples.

Synonyms

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