Etymology
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vacuum (n.)

1540s, "emptiness of space," from Latin vacuum "an empty space, vacant place, a void," noun use of neuter of vacuus "empty, unoccupied, devoid of," figuratively "free, unoccupied," from Proto-Italic *wakowos, related to the source of Latin  vacare "to be empty" (from PIE *wak-, extended form of root *eue- "to leave, abandon, give out"), with adjectival suffix -uus. Properly a loan-translation of Greek kenon, literally "that which is empty."

Meaning "a space emptied of air" is attested from 1650s. Vacuum tube "glass thermionic device" is attested from 1859. Vacuum cleaner is from 1903; shortened form vacuum (n.) first recorded 1910.

The metaphysicians of Elea, Parmenides and Melissus, started the notion that a vacuum was impossible, and this became a favorite doctrine with Aristotle. All the scholastics upheld the maxim that "nature abhors a vacuum." [Century Dictionary]

vacuum (v.)

"to clean with a vacuum cleaner," by 1913, from vacuum (n.). Related: Vacuumed; vacuuming.

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Definitions of vacuum
1
vacuum (n.)
the absence of matter;
Synonyms: vacuity
vacuum (n.)
an empty area or space;
without their support he'll be ruling in a vacuum
Synonyms: void / vacancy / emptiness
vacuum (n.)
a region that is devoid of matter;
Synonyms: vacuity
vacuum (n.)
an electrical home appliance that cleans by suction;
Synonyms: vacuum cleaner
2
vacuum (v.)
clean with a vacuum cleaner;
vacuum the carpets
Synonyms: vacuum-clean / hoover
From wordnet.princeton.edu