vacuum - definition and synonyms

 
noun 

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/ˈvækjʊəm/
singularvacuum
pluralvacuums
  1. 1
    [countable] physics a space that has had all the air and any other gases removed from it
     Synonyms and related words
  2. 2
    [singular] a feeling that something is missing, or a situation in which something is missing
    political/power vacuum:

    the political vacuum left by his unexpected death

    create a vacuum:

    The collapse of the dictatorship created a vacuum in which criminal gangs flourished.

    fill a vacuum (=replace something):

    They need something to fill the vacuum left by the end of Marxism.