trey in WordNet English dictionary

1. the cardinal number that is the sum of one and one and one
   three  3  III  trio  threesome  tierce  leash  troika  triad  trine  trinity  ternary  ternion  triplet  tercet  terzetto  trey  deuce-ace 
   
2. one of four playing cards in a deck having three pips
   trey  three