v. & n.
--v.
1. tr. disturb the smoothness or tranquillity of.
2 tr. upset the calmness of (a person).
3 tr. gather (lace etc.) into a ruffle.
4 tr. (often foll. by up) (of a bird) erect (its feathers) in anger, display, etc.
5 intr. undergo ruffling.
6 intr. lose smoothness or calmness.
--n.
1. an ornamental gathered or goffered frill of lace etc. worn at the opening of a garment esp. round the wrist, breast, or neck.
2 perturbation, bustle.
3 a rippling effect on water.
4 the ruff of a bird etc. (see RUFF(1) 2).
5 Mil. a vibrating drum-beat.
Etymology: ME: orig. unkn.