Definition of bunker noun from the Oxford Advanced American Dictionary

     

    bunker

     noun
    noun
    NAmE//ˈbʌŋkər//
     
     
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  1. 1a strongly built shelter for soldiers or guns, usually underground a concrete/underground/secret bunker
  2. 2a container for storing coal, especially on a ship or outside a house a coal bunker
  3. 3(also sand trap, trap) a small area filled with sand on a golf course He hit his second shot into a bunker.
See the Oxford Advanced Learner's Dictionary entry: bunker