"decisive division" is a correct and usable phrase in written English.
You can use it to refer to a division between two things that is decisive or final, such as a ruling in a court case or a policy decision in a political debate. For example, "The Supreme Court's decisive division on the issue of same-sex marriage set a precedent that has impacted policy across the nation."
In the Giants' decisive division-series victory against Cincinnati, Wilson broke the tension in the dugout by shouting at a Reds ball boy, "You're going down!" "He's never short of words," reliever George Kontos said.
Security Council members are in trouble because they have been hiding behind Annan's plan and their "consensus" that has now become a decisive drive, as division has prevailed and resulted in a dual veto by Russia and China, twice so far.
This division proved decisive when things went wrong four nights later.
When they lost the lead to Arizona on Friday, in the decisive game of a division series, the owner, Mark Attanasio, fretted in his box beside the dugout.
Each team was forced to use its ace in the decisive game of the division series, and each worked nine innings.
The St . LouisCardinals had extinguished the Phillies, 1-0, thepliNo.the No. 1 seed in its home park in the decisive game of its division series.
Before the decisive game of the division series in Oakland last year, Eric Chavez did an interview and was asked if he was ready for the possible end to the Yankees dynasty.
Besides a six-run outburst in the first inning against Oakland -- leading to a victory in the decisive game of the division series -- the Yankees have scored only 13 runs in the other 52 innings of the playoffs.
The effort helped to clear the sour taste left by his last outing, when he gave up six runs to the Washington Nationals in the decisive game of the division series before getting bailed out by his teammates with a spectacular comeback.
