1. 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.
Etymology: ME f. OF pignon ult. f. L pinna: see PIN 2. n.1 a small cog-wheel engaging with a larger one.
2 a cogged spindle engaging with a wheel.
Etymology: F pignon alt. f. obs. pignol f. L pinea pine-cone (as PINE(1))