Definition of "determining factor" []

• A determining or causal element or factor (noun)
• An argument that is conclusive (noun)

WordNet. Princeton University. 2010.

• "Your profile can also determine what interest rates you pay, higher or lower, and in some cases will also be a determining factor in whether you get a certain job or even an applied-for larger life insurance policy."
• "The Money Movement Strategy using interest rates as the determining factor will bring you closer to being at the right place at the right time than any other strategy, simple or complicated, that I have ever seen."