To make definite.
Limiting the extent; determinate; positive; express: as, a definitive term.
Ending; determining; final; conclusive: opposed to conditional, provisional, or interlocutory.
Specifically— In biology, completely formed; fixed and finished: opposed to primitive or formative: as, the definitive aorta; a definitive anus.
In logic, applied to a judgment which is accompanied by a full assent of the mind.
In metaphysics, having position without occupying space.
noun.
In grammar, a defining or limiting word, as an article, a demonstrative, or the like.