De-ci'sive, a.
a. [From Lat. decīdĕre; Fr. décisif, It. decisivo. See supra.]
Sense 1. Having the power or quality of deciding a question or controversy, &c.; final; conclusive; putting an end to controversy. “A decisive, irrevocable doom.” Bates. “Decisive campaign.” Macaulay. “Decisive proof.” Hallam.
Sense 2. Marked by promptness and decision.
A noble instance of this attribute of the decisive character. J. Foster.
Synonyms—Decided; positive. See DECIDED.