SAT GRE TOEFL monotonous Definition Dull, repetitious, and lacking in variety. Example "The monotonous hum of the engine made it hard to stay awake." Sign in to save SAT PDF — $25 GRE PDF — $25 TOEFL PDF — $25 ← monopoly monotony → Study tips featuring "monotonous" TOEFL Academic Vocabulary: Study by Topic How Context Clues Save You on the SAT 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