vacuum

• vacuüm (rare)

From Latin vacuum (“an empty space, void”), noun use of neuter of vacuus (“empty”), related to vacare (“be empty”)

• IPA^(key): /ˈvæ.kjuːm/, /ˈvæ.kjuː.əm/

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vacuum (plural vacuums or vacua) (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

• The Latin in vacuo is sometimes used instead of in a vacuum (in free space).

• (vacuum cleaner): hoover (British)

• (region of space that contains no matter): plenum

vacuum (third-person singular simple present vacuums, present participle vacuuming, simple 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.

• (transitive sense): to hoover (British)
• (intransitive sense): to do the hoovering, to hoover (British)

• IPA^(key): /va.kɥɔm/

vacuum m (plural vacuums)

1. vacuum (space containing no matter)

• vide

• “vacuum” in le Trésor de la langue française informatisé (The Digitized Treasury of the French Language).

vacuum

1. nominative neuter singular of vacuus

• vácuum (recommended)

vacuum m (plural vacuums)

1. vacuum