Meaning of honor trick

hon'or trick"

Pronunciation: [key]
— Bridge. Bridge.
  1. (in certain bidding systems) a high card or set of high cards that can reasonably be expected to take a trick, the total worth of such cards in a hand being the basis for evaluating its strength and bidding.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.