n. & v.
n. 1 the outer part of a bird's wing, usu. including the flight feathers. 2 poet. a wing; a flight-feather.
v.tr. 1 cut off the pinion of (a wing or bird) to prevent flight. 2 a bind the arms of (a person). b (often foll. by to) bind (the arms, a person, etc.) esp. to a thing.
[ ME f. OF pignon ult. f. L pinna: see PIN ]