'Trey' definitions:

Definition of 'trey'

From: WordNet
noun
The cardinal number that is the sum of one and one and one [syn: three, 3, III, trio, threesome, tierce, leash, troika, triad, trine, trinity, ternary, ternion, triplet, tercet, terzetto, trey, deuce- ace]
noun
One of four playing cards in a deck having three pips [syn: trey, three]

Definition of 'Trey'

From: GCIDE
  • Trey \Trey\, n. [OF. treis three, F. trois, L. tres. See Three, and cf. Tray-trip.] Three, at cards, dice, or dominoes; a card, die, or domino of three spots or pips. [1913 Webster]
  • Seven is my chance and thine is cinq and trey. --Chaucer. [1913 Webster]