SLOTS

noun

1. A broad, flat, wooden bar, a slat, especially as used to secure a door, window, etc.
2. A metal bolt or wooden bar, especially as a crosspiece.
3. An implement for baring, bolting, locking or securing a door, box, gate, lid, window or the like.

verb

1. To bar, bolt or lock a door or window.
2. To shut with violence; to slam.

noun

1. A narrow depression, perforation, or aperture; especially, one for the reception of a piece fitting or sliding in it.
2. A gap in a schedule or sequence.
3. The allocated time for an aircraft's departure or arrival at an airport's runway.