decisive

1. Determining or having the power to determine an outcome (synset 300687757)
   "cast the decisive vote"; "two factors had a decisive influence"
   also:

   • conclusive - forming an end or termination; especially putting an end to doubt or question
   • crucial, important - of extreme importance; vital to the resolution of a crisis
   similar to:

   • deciding, determinant, determinative, determining - having the power or quality of deciding
   • fatal, fateful - having momentous consequences; of decisive importance
   • peremptory - putting an end to all debate or action
2. Unmistakable (synset 300704623)
   "had a decisive lead in the polls"
   similar to: definite - precise; explicit and clearly defined
3. Characterized by decision and firmness (synset 300688915)
   "an able and decisive young woman"; "we needed decisive leadership"; "she gave him a decisive answer"
   also: resolute - firm in purpose or belief; characterized by firmness and determination
   similar to: resolute, unhesitating - characterized by quickness and firmness
4. Forming or having the nature of a turning point or crisis (synset 300659155)
   "a critical point in the campaign"; "the critical test"
   similar to: crucial, important - of extreme importance; vital to the resolution of a crisis
   same as: critical

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