prove valid; show or confirm the validity of something
"The scientific study validated the hypothesis that exercise improves cardiovascular health."
give evidence for
"The recent scientific study validates the hypothesis that climate change is accelerating faster than previously thought."
To render valid.
"The judge's ruling validated the contract, making it legally binding from that moment forward."
First attested in 1648; borrowed from Medieval Latin validātus ("to validate") (perhaps through Middle French valider), the perfect passive participle of validō (see -ate (verb-forming suffix)), from validus + -ō (verb-forming suffix). By surface analysis, valid + -ate.