| Noun | 1. | deuce-ace - the cardinal number that is the sum of one and one and onetercet, ternary, ternion, terzetto, three, threesome, trey, triad, trine, trinity, trio, triplet, 3, III, leash, troika, tierce digit, figure - one of the elements that collectively form a system of numbers; "0 and 1 are digits" | |