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

     

    headspace

     noun
    noun
    BrE BrE//ˈhedspeɪs//
     
    ; NAmE NAmE//ˈhedspeɪs//
     
    [uncountable]
     
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  1. 1the amount of air or empty space that is left above the contents of a container before it is sealed Proper sample collection techniques include use of a glass tube with minimal headspace remaining after collection.
  2. 2(informal) the way you think or feel about something Whenever you read a book, you're entering the writer's headspace.
  3. 3(informal) time to think clearly without any pressure I could do with a bit of headspace just to think about what I'm doing.