SAT GRE invalidate Definition To make legally or factually invalid or void. Example "New evidence could invalidate the court's earlier decision." Sign in to save SAT Quiz → GRE Quiz → ← invalid invaluable → Stories featuring "invalidate" Mercy at the Burning Farm Study tips featuring "invalidate" Map the Author's Attitude Before Reading Questions Force Contrast Between Two Similar Words Stop Skipping Words and Read the Tone Related words SAT antonym SAT abase SAT abdicate SAT abdomen SAT abduction SAT abet SAT abeyance SAT abject SAT abjure SAT ablution SAT abnegate SAT abnormal