flight feather definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any of the large feathers of the wings or tail that support a bird in flight
flight feather definition by American Heritage Dictionary
Any of the comparatively large, stiff feathers of a bird's wing or tail that are necessary for flight.