- a tall pole on a boat or ship that supports the sailsTopics Transport by waterc1
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- a tall metal tower with an aerial that sends and receives radio, television or phone signals see also phone mastTopics TV, radio and newsc2
- a tall pole that is used for holding a flag see also half mast
Word OriginOld English mæst, of West Germanic origin; related to Dutch mast and German Mast.
Idioms
See mast in the Oxford Advanced American Dictionarynail your colours to the mast
- (especially British English) to say publicly and clearly what you believe or who you support
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mast