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



    BrE BrE//mɑːst//
    ; NAmE NAmE//mæst//
    Parts of boats and ships
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  1. 1a tall pole on a boat or ship that supports the sails See related entries: Parts of boats and ships
  2. 2a tall metal tower with an aerial that sends and receives radio or television signals
  3. 3a tall pole that is used for holding a flag
  4. see also half mast
    Word OriginOld English mæst, of West Germanic origin; related to Dutch mast and German Mast.Idioms
    nail your colours to the mast
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    (especially British English) to say publicly and firmly what you believe or who you support
See the Oxford Advanced American Dictionary entry: mast