Decisive

Part of speech: adjective (a.)

1. Having the power or quality of deciding a question or controversy; putting an end to contest or controversy; final; conclusive. "A decisive, irrevocable doom." Bates. "Decisive campaign." Macaulay. "Decisive proof." Hallam.

2. Marked by promptness and decision. A noble instance of this attribute of the decisive character. J. Foster.

Synonyms: Decided; positive; conclusive. See Decided. De*ci"sive*ly, adv. De*ci"sive*ness, n.