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

mast

noun
 
/mɑːst/
 
/mæst/
 Idioms
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  1. a tall pole on a boat or ship that supports the sailsTopics Transport by waterc1
  2. a tall metal tower with an aerial that sends and receives radio, television or phone signals see also phone mastTopics TV, radio and newsc2
  3. a 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
  1. (especially British English) to say publicly and clearly what you believe or who you support
See mast in the Oxford Advanced American Dictionary
Check pronunciation: mast

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