v. & n.
v. 1 intr. & tr. hang or allow to hang down; languish, decline, or sag, esp. from weariness. 2 intr. a (of the eyes) look downwards. b poet. (of the sun) sink. 3 intr. lose heart; be dejected; flag.
n. 1 a drooping attitude. 2 a loss of spirit or enthusiasm. droop-snoot colloq.
adj. (of an aircraft) having an adjustable nose or leading-edge flap.
n. such an aircraft.
[ ME f. ON dr£pa hang the head f. Gmc: cf. DROP ]