The phrase "a decisive poll" is correct and usable in written English.
It can be used when referring to a poll that has a significant impact on an outcome or decision, often in the context of elections or public opinion.
Example: "The results of the decisive poll indicated a clear preference among voters, shaping the candidates' strategies for the upcoming election."
Alternatives: "a critical survey" or "a determining poll".
Mr Miliband's intervention, in an article for the Financial Times, puts an end to speculation that the Opposition could match David Cameron's promise to hold a decisive poll by 2017.
His message was echoed by the legendary leftist Manolis Glezos who implored voters not to ignore what he described as a decisive poll nearly six years after the eruption of Greece's debt crisis "Today's elections are definitive for the course of the country," said the nonagenarian, for many the face of resistance not only against brutal German occupation but brutal German-imposed austerity.
While Ms. O'Hara has picked up a few votes (it's simply not the year for Jenna Russell, Faith Prince or Kerry Butler), Ms. LuPone has a decisive lead in the poll.
Sensational turns up at the very end, after the fans have worked themselves into a roaring lather singing along to Angels, and you almost pity the new song for having to compete with the emotion that Angels – the song that once won a decisive victory in a poll of tunes Britons want played at their funeral – wrings out of the audience.
President Bush, bidding fair to become the least popular president since modern polling began, had just led the Republicans to a decisive "thumping" at the polls, losing control of both houses of Congress -- and had felt obliged finally to fire Rumsfeld, Cheney's longtime mentor, over the latter's dogged and strenuous objections.
Only a decisive victory at the polls can yield a workable majority in both houses of parliament.
Erdoğan called for early parliamentary elections, and his party won a decisive victory at the polls in July.
So far, however, he does not have a decisive lead in the polls.For background, see article The European Union and India will hold a meeting in Marseilles on Monday September 29th.
Upending expectations, Mr. Gingrich has taken a decisive lead in new polls in several early-voting states, benefiting from the drift of Herman Cain supporters even before Mr. Cain suspended his campaign on Saturday.
Tory and Labour supporters may complain that their leader's caution explains why they have so far not managed to take a decisive lead in the polls.
