winning opening 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.
Court Tennis any of three openings, the dedans, grille, or winning gallery: a ball played into any of these wins a point
winning opening definition by American Heritage Dictionary
Any of three openings in court tennis into which a played ball may be hit, thus affording the player a point.