English
vacuum
Pronunciation
  • IPA: /ˈvæ.kjuːm/, /ˈvæ.kjuː.əm/
Noun

vacuum (plural vacuums) (see usage notes)

  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. (physics) A spacetime having tensors of zero magnitude
Synonyms
  • (a region of space that contains no matter) vacancy, void
  • (vacuum cleaner) hoover (British)
Antonyms
  • (region of space that contains no matter) plenum
Translations Verb

vacuum (vacuums, present participle vacuuming; past and past participle vacuumed)

  1. (transitive) To clean (something) with a vacuum cleaner.
  2. (intransitive) To use a vacuum cleaner.
  3. (transitive, databases) To optimise a database or database table by physically removing deleted tuples.
Synonyms
  • (transitive sense) to hoover (British)
  • (intransitive sense) to do the hoovering, to hoover (British)
Translations Translations

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