adjective

1. having exact limits
2. precise and clear in meaning; explicit
3. certain; positive it's definite that he'll go
4. Bot. having a constant number of stamens, etc., less than 20 but always a multiple of the number of petals
5. Gram. limiting or specifying; referring to a specific or previously identified person, thing, etc. “the” is the definite article

Etymology: L definitus, pp. of definire: see define