slat

Short definition from Wiktionary

Noun

1. 1
   A thin, narrow strip or bar of wood (lath), metal, or plastic.
2. 2
   A control surface that extends forwards and downwards from the leading edge of a wing, leaving a gap between it and the leading edge, in order to modify the airflow around the wing so as to allow flight at a higher angle of attack without stalling, lowering the aircraft's stall speed.
3. 3
   A ski.
4. 4
   A thin piece of stone; a slate.
5. 5
   A drop (of rain or water), a splash.

Verb

1. 1
   To construct or provide with slats.
2. 2
   To slap or strike; to beat, pummel; to hurl or throw down violently.
3. 3
   To throw (something, especially water or liquid) down; to slam or splash (something) down.
4. 4
   To fall; to beat (against something).
5. 5
   To split; to crack.
6. 6
   To set on; to incite.