Definition of gap noun from the Oxford Advanced American Dictionary

      

    gap

     noun
    noun
    NAmE//ɡæp//
     
    gap (in/between something)
     
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  1. 1 a space between two things or in the middle of something, especially because there is a part missing a gap in a hedge She had a gap between her two front teeth. There should be a six-inch gap at the bottom.
  2. 2a period of time when something stops, or between two events a gap in the conversation They met again after a gap of twenty years. There's a big age gap between them (= a big difference in their ages).
  3. 3a difference that separates people, or their opinions, situation, etc. the gap between rich and poor the gap between theory and practice see also credibility, generation gap
  4. 4a space where something is missing His death left an enormous gap in my life. There were several gaps in my education. We think we've identified a gap in the market (= a business opportunity to make or sell something that is not yet available).
  5. Idioms
    bridge the gap/gulf/divide (between A and B)
     
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    to reduce or get rid of the differences that exist between two things or groups of people
See the Oxford Advanced Learner's Dictionary entry: gap