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

     

    fulcrum

     noun
    noun
    BrE BrE//ˈfʊlkrəm//
     
    ; NAmE NAmE//ˈfʊlkrəm//
     
    ; BrE BrE//ˈfʌlkrəm//
     
    ; NAmE NAmE//ˈfʌlkrəm//
     
    (pl. fulcrums, fulcra
    BrE BrE//ˈfʊlkrə//
     
    ; NAmE NAmE//ˈfʊlkrə//
     
    ; BrE BrE//ˈfʌlk//
     
    ; NAmE NAmE//ˈfʌlk//
     
    )
     
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  1. 1 (physics) the point on which a lever turns or is supported
  2. 2[usually singular] the most important part of an activity or a situation the fulcrum of the whole debate There was a fulcrum point when the arguments tipped decidedly in one direction.
  3. Word Origin late 17th cent. (originally in the general sense ‘a prop or support’): from Latin, literally ‘post of a couch’, from fulcire ‘to prop up’.
See the Oxford Advanced American Dictionary entry: fulcrum