The phrase "a definitive position on" is correct and usable in written English.
It can be used when discussing a clear and firm stance or opinion regarding a particular issue or topic.
Example: "The committee has yet to take a definitive position on the proposed policy changes."
Alternatives: "a clear stance on" or "a firm viewpoint regarding".
At least one such Democrat, West Virginia senator Joe Manchin, would not take a definitive position on the deal but signaled that he agreed with Obama's broader view of engagement as a means toward preventing Iran from acquiring a nuclear weapon.
"We haven't reached a definitive position on this.
Governor Cuomo and Representative Alexandria Ocasio-Cortez have mostly avoided taking a definitive position on this.
Ms. Merkel has not expressed a definitive position on the issue, at least not in public.
Big picture (tick appropriate box): Has he or she taken a definitive position on statism and interventionism?
The much larger-scale polling, carried out last week, underlined those perceptions and sounded a warning that taking a definitive position on Brexit could hurt Labour's standing.
Before long, she is teleporting through time and space to ace a tricky homework paper, in the process offering a fairly definitive position on the morality of punching Nazis.
At the time, Clinton was under rising pressure from progressive activists to take a more definitive position on the trade agreement.
It has also become a politically delicate issue, with some new government officials refusing to release hard statistics on casualties and human rights groups cautious about taking a definitive position.
Though closely grilled on the question of whether he would support the president's opposition to cloning and human embryonic stem cell research, Zerhouni managed to avoid making a definitive position statement.
