Definition of vacuum noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈvækjuəm//
    ; NAmE NAmE//ˈvækjuəm//
    The universe
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  1. 1a space that is completely empty of all substances, including all air or other gas a vacuum pump (= one that creates a vacuum) vacuum-packed foods (= in a package from which most of the air has been removed) See related entries: The universe
  2. 2[usually singular] a situation in which somebody/something is missing or lacking His resignation has created a vacuum which cannot easily be filled.
  3. 3[usually singular] the act of cleaning something with a vacuum cleaner to give a room a quick vacuum
  4. Word Originmid 16th cent.: modern Latin, neuter of Latin vacuus ‘empty’.Extra examples Other gases rush in to fill the vacuum. The machine then creates a vacuum. The writer criticized the moral vacuum in society.Idioms existing separately from other people, events, etc. when there should be a connection This kind of decision cannot ever be made in a vacuum.
See the Oxford Advanced American Dictionary entry: vacuum