mast /mɑːst $ mæst/ BrE AmE noun [countable]
[ Language: Old English ; Origin: mæst ]
1 . a tall pole on which the sails or flags on a ship are hung
2 . British English a tall metal tower that sends out radio and television signals:
a radio mast
3 . a tall pole on which a flag is hung
⇨ ↑ half-mast