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

     

    bunker

     noun
    noun
    BrE BrE//ˈbʌŋkə(r)//
     
    ; NAmE NAmE//ˈbʌŋkər//
     
    Buildings, Golf, Parts of boats and ships
     
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  1. 1a strongly built shelter for soldiers or guns, usually underground a concrete/underground/secret bunker See related entries: Buildings
  2. 2a container for storing coal, especially on a ship or outside a house a coal bunker See related entries: Parts of boats and ships
  3. 3(also especially North American English sand trap, trap) a small area filled with sand on a golf course He hit his second shot into a bunker. See related entries: Golf
  4. Word Origin mid 16th cent. (originally Scots, denoting a seat or bench): perhaps related to bunk ‘narrow bed’.Extra examples She had a difficult job getting the ball out of the bunker. The war cabinet met in an underground bunker. In preparation for the worst, huge underground bunkers were built.
See the Oxford Advanced American Dictionary entry: bunker