To decisively something is to reach a definite conclusion about something. When you decisively win a game, you win by scoring more points than your opponent.
He decisively won the game by scoring two goals in the last few minutes.
She decisively rejected his offer.
adverb
with firmness
Synonyms:
ADV
with finality; conclusively
ADV
in an indisputable degree
1
Again, this is the conclusive decision on the matter.
2
The final decision is by no means a foregone conclusion.
3
The appellate decision affirms the trial decision.
4
The decision was unlawful.
5
If a decision is appealed, it is not effectual until a final decision is made.
6
In the movie, the decision is spontaneous.
7
The absurdity of this decision is astonishing.
8
The decision for the censorship is unknown.
9
The decision of the court was not retroactive.
10
The decision was deferred by the Minister.