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Definition of vacuum


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vacˇuˇum  audio  (vky-m, -ym, -ym) KEY  

NOUN:
pl. vacˇuˇums or vacˇuˇa   (-y-) KEY  
    1. Absence of matter.
    2. A space empty of matter.
    3. A space relatively empty of matter.
    4. A space in which the pressure is significantly lower than atmospheric pressure.
  1. A state of emptiness; a void.
  2. A state of being sealed off from external or environmental influences; isolation.
  3. pl. vacˇuums A vacuum cleaner.
ADJECTIVE:
  1. Of, relating to, or used to create a vacuum.
  2. Containing air or other gas at a reduced pressure.
  3. Operating by means of suction or by maintaining a partial vacuum.
tr. & intr.v.
vacˇuˇumed , vacˇuˇumˇing , vacˇuˇumes
To clean with or use a vacuum cleaner.

ETYMOLOGY:
Latin, empty space, from neuter of vacuus, empty, from vacre, to be empty; see eu- in Indo-European roots


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The American Heritage® Dictionary of the English Language, Fourth Edition.
Copyright © 2000 by Houghton Mifflin Company.
Published by the Houghton Mifflin Company. All rights reserved.
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