decisive

adj

1. Having the power or quality of deciding a question or controversy; putting an end to contest or controversy; final; conclusive.

   “decisive vote”

   “decisive battle”

   “In truth, Tottenham never really looked like taking all three points and this defeat means they face a battle to reach the knockout stages -with their next home game against PAOK Salonika on 30 November likely to prove decisive.”

2. Decided; definite; incontrovertible.

   “decisive victory”

   “[F]abulous forces are there encountered and a decisive victory is won: […]”

3. Marked by promptness and decision, resolute; without hesitation.

   “decisive action”

   “a decisive person”

   “A noble instance of this attribute of the decisive character.”