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bonanza definition

☆ bo·nanza (bə nan′zə, bō-)

noun

  1. a very rich vein or pocket of ore
  2. any source of great wealth or profits

Etymology: Sp, fair weather, prosperity < VL *bonacia, < L bonus, good (see bonus), after malacia, calm at sea (assumed to be < malus, bad) < Gr malakia < malakos, soft, akin to mylē, mill

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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