(emergency medicine, military) Initialism of military antishock trousers; inflatable trousers that apply pressure to the inferior half of a patient's body to decrease blood loss and prevent the onset of shock, similar to a tourniquet.

(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).

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

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.

(of swine and other animals) To feed on forest seed or fruit.

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

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

A surname.

(often in combination) Having (the specified kind or number of) masts.

simple past tense and past participle of mast