1. [ adjective ] being one more than two
Synonyms: three 3
Related terms: cardinal
2. [ noun ] (mathematics) the cardinal number that is the sum of one and one and one
Synonyms: three 3 trio triad trinity tierce trey trine ternion ternary tercet triplet terzetto troika leash deuce-ace threesome
Related terms: digit
Similar spelling:   II