(nautical, communication, aviation) A tall, slim post or tower, usually tapering upward, used to support, for example, sails or observation platforms on a ship, the main rotor of a helicopter, flags, floodlights, meteorological instruments, or communications equipment, such as an aerial, usually supported by guy-wires (except in the case of a helicopter).

(bodybuilding slang) The anabolic steroid Drostanolone propionate, also known as Masteron

The fruit of forest-trees (beech, oak, chestnut, pecan, etc.), especially if having fallen from the tree, used as fodder for pigs and other animals.

(obsolete, billiards) A type of heavy cue, with the broad end of which one strikes the ball.

To supply and fit a mast to (a ship).

plural of mast

Third-person singular simple present indicative form of mast

plural of masting

plural of MAST

(nautical) Having ten masts.