A thin, narrow strip or bar of wood (lath) or metal.

“slats of a window blind”

(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.

A ski.

To construct or provide with slats.

To slap; to strike; to beat; to throw down violently.

To split; to crack.