Meaning

• 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.

Meaning

• To bar, bolt or lock a door or window.

• To shut with violence; to slam.

  "to slot a door"