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

     

    capstone

     noun
    noun
    BrE BrE//ˈkæpstəʊn//
     
    ; NAmE NAmE//ˈkæpstoʊn//
     
     
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  1. 1a stone placed at the top of a building or wall
  2. 2(especially North American English) the best and final thing that somebody achieves, thought of as making their career or life complete This award is a fitting capstone to his career.
See the Oxford Advanced American Dictionary entry: capstone