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Meaning of trifecta

tri•fect•a

Pronunciation: (trī'fek"tu), [key]
— n.
  1. a type of bet, esp. on horse races, in which the bettor must select the first three finishers in exact order.
  2. a race in which such bets are made. Cf. superfecta. Also called triple.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.