decisive
adjective
1. determining or having the power to determine an outcome
- cast the decisive vote
- two factors had a decisive influence
Similar word(s): conclusive, crucial, important, deciding, determinant, determinative, determining, fatal, fateful, peremptory
2. unmistakable
- had a decisive lead in the polls
Similar word(s): definite
3. characterized by decision and firmness
- an able and decisive young woman
- we needed decisive leadership
- she gave him a decisive answer
Similar word(s): resolute, unhesitating, resolute
4. forming or having the nature of a turning point or crisis
Similar word(s): crucial, important, critical
Sentences with decisive as an adjective:
- A decisive battle is fatal for one side's war chances
- A noble instance of this attribute of the decisive character. -J. Foster.