vacuum
/ˈvæk·jum/, /-ju·əm/, /-jəm/ n [C]Definition
› physics a space without any gas or other matter in it, or a space from which most of the air or gas has been removed: Edison knew that he had to create a vacuum inside the lightbulb. fig. No marriage exists in a vacuum (= in a situation where nothing else has any influence).
(Definition of vacuum n from the Cambridge Academic Content Dictionary
© Cambridge University Press)
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