Simple past tense and past participle of invalidate.(verb)
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Use "invalidated" in a sentence
"Woese called the DI's bluff and yes, you do look exactly like crackpots who claim that Einstein invalidated Newtonian physics."
"Turns out that the sublet agreement I had with the guy who's room I was staying in invalidated his lease agreement cause I'm not a Kellogg college student."
"Jim Louderback, who may have been a flashy personality on cable TV but obviously has never been either a lawyer or an engineer, is apparently ignorant of the fact is that the FCC's authority was not "invalidated" - it never had such authority in the first place, and was trying to usurp powers that neither we, the people nor our Congress ever gave it."