/ mɑːst; NAmE mæst/ noun
1.
a tall pole on a boat or ship that supports the sails
—picture at yacht
2.
a tall metal tower with an aerial that sends and receives radio or television signals
3.
a tall pole that is used for holding a flag
—see also half mast
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IDIOMS
see nail verb
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WORD ORIGIN
Old English mæst , of West Germanic origin; related to Dutch mast and German Mast .