From WordNet (r) 3.0 (2006) [wn]:
iii
adj 1: being one more than two [syn: three, 3, iii]
n 1: 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}]