Definition of: droop

(drp) v.i.
1. To sink down; hang downward.
2. To lose vigor or vitality.
3. To become dejected; lose spirit.
—v.t.
4. To allow to hang or sink down. See synonyms under FALL.
—noun A sinking or hanging down; specifically, the bending under its own weight of the long barrel of an artillery gun. [<ON drūpa]
—droop′ing adjective
—droop′ing·ly adverb