present participle of determine
"The detective was determining exactly how much evidence we had before making any arrests."
In plain English: Determining means finding out exactly what something is or will happen.
"The weather is determining whether we will go on our picnic today."
Usage: Use "determining" to describe an action that is currently happening where you are finding out facts or deciding on a course of action. Avoid using it to mean the final result itself; instead, use the past tense "determined" for completed decisions.
having the power or quality of deciding
"the crucial experiment"
"cast the deciding vote"
"the determinative (or determinant) battle"
Derived from the Latin determinare, meaning "to set limits," this form comes from the past participle of de- (completely) and terminus (boundary). It originally described the act of fixing or defining precise boundaries for something.