Plain English Meaning
Movable or fixed parts on the front edge of the wing that help the wing keep flying at slow speeds, especially during takeoff and landing.
Full Definition
High-lift attachments mounted on the leading edge (front edge) of the wing — such as slats, slots, leading edge flaps, and Krueger flaps — that increase the lift produced at low airspeeds and high angles of attack, allowing the airplane to fly slower without stalling.
Context Anchor
Seen in discussions of takeoffs, landings, slow flight, stalls, and airplane .