SLAT

noun

1. A thin, narrow strip or bar of wood (lath) or metal.
2. (aeronautical) A movable control surface at the leading edge of a wing that when moved, changes the chord line of the airfoil, affecting the angle of attack. Employed in conjunction with flaps to allow for a lower stall speed in the landing attitude, facilitating slow flight.
3. A ski.

verb

1. To construct or provide with slats.
2. To slap; to strike; to beat; to throw down violently.
3. To split; to crack.