A broad, flat, wooden bar, a slat, especially as used to secure a door, window, etc. A metal bolt or wooden bar, especially as a crosspiece. An implement for baring, bolting, locking or securing a door, box, gate, lid, window or the like. A channel opening in the stator or rotor of a rotating machine for ventilation and insertion of windings. The barrel or tube of a wave. A narrow depression, perforation, or aperture; especially, one for the reception of a piece fitting or sliding in it. A gap in a schedule or sequence. The allocated time for an aircraft's departure or arrival at an airport's runway. In a flying display, the fourth position; after the leader and two wingmen. A space in memory or on disk etc. in which a particular type of object can be stored. A slot machine designed for gambling. The vagina. The track of an animal, especially a deer; spoor. (Antarctica) A crack or fissure in a glacier or snowfield; a chasm; a crevasse.

To bar, bolt or lock a door or window. To shut with violence; to slam. To put something (such as a coin) into a slot (narrow aperture) To assign something or someone into a slot (gap in a schedule or sequence) To put something where it belongs. (Rhodesia, in the context of the Rhodesian Bush War) To kill. (Antarctica) To fall, or cause to fall, into a crevasse.