| Noun | 1. | III - 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, deuce-ace, leash, troika, tierce digit, figure - one of the elements that collectively form a system of numbers; "0 and 1 are digits" | |