To proceed downward, or toward a close; to decline.
To lose all energy, enthusiasm or happiness; to flag.
To slowly become limp; to bend gradually.
To allow to droop or sink.
To hang downward; to sag.
A condition or posture of drooping.
A hinged portion of the leading edge of an aeroplane's wing, which swivels downward to increase lift during takeoff and landing.
Something which is limp or sagging.
To despair; to experience reduced morale.