c. 1500, "fixed, established; certain, precise;" 1550s, "having fixed limits," from Latin definitus "defined, bounded, limited," past participle of definire "to limit, determine, explain," from de "completely" (see de-) + finire "to bound, limit," from finis "boundary, end" (see finish (v.)). From 1727 in grammar, "defining, limiting." Definite means "defined, clear, precise, unmistakable;" definitive means "having the character of finality." Related: Definiteness.