SAT GRE TOEFL onus Definition A burden or responsibility for something. 日本語 責任 Example "The onus is on the defense to prove the accused's innocence." Sign in to save SAT Quiz → GRE Quiz → TOEFL Quiz → ← onslaught ooze → Study tips featuring "onus" Spot the Vocabulary Trap in Every Question Write GRE Words Into Your Own Sentences TOEFL Academic Vocabulary: Study by Topic Related words SAT abase SAT abdicate SAT abdomen SAT abduction SAT abet SAT abeyance SAT abject SAT abjure SAT ablution SAT abnegate SAT abnormal SAT abominable