decisive
US /dɪˈsaɪ.sɪv/
UK /dɪˈsaɪ.sɪv/
1.
having or showing the ability to make decisions quickly and effectively
:
•
A decisive leader is essential in times of crisis.
•
She is known for her decisive actions.
2.
settling an issue; producing a definite result
:
•
The goal proved to be the decisive moment in the match.
•
The evidence was decisive in proving his guilt.