The phrase "a definite effect on" is correct and usable in written English.
It can be used when discussing the specific impact or influence that something has on another thing or situation.
Example: "The new policy had a definite effect on employee productivity, leading to improved performance across the board."
Alternatives: "a clear impact on" or "a significant influence on".
This had a definite effect on me.
"As a woman and a designer, going through all these milestones has had a definite effect on my perspective.
Unlike the two factors, the hardness does not have a definite effect on the kinematic performance, on which a further study is required.
Gallani found that board interlock and compensation consultants had a definite effect on CEO compensation packages.
However he says the science shows that there is a definite effect on the brain, particularly in children.
Contradictory reports in the literature fail to reach a consensus whether or not extractions have a definite effect on the vertical dimension [12 20].
Shanghai seethes with translators and the authors they have chosen to work on have a definite effect upon their personalities.
By Emily Hahn The New Yorker, March 14 , 1936P. 80 Shanghai seethes with translators and the authors they have chosen to work on have a definite effect upon their personalities View Article By Jelani Cobb By David Remnick By Jia Tolentino By Masha Gessen.
Fortenberry said the May 19 demonstration and other student criticism had a very definite effect on the administration because they evidenced student concern and highlighted issues that administrators had not considered thoroughly.
This has been a cumulative effect over the last few months, but (on all but the biased right-wing media) it had a definite effect overall in the coverage.
The experimental results suggested that introduction of wood flour changed the mechanical properties of PLA, whereas triclosan had no definite effect on the mechanical properties.
