SAT GRE TOEFL imperceptible Definition Too slight or gradual to be seen or noticed. Example "There was an imperceptible shift in the wind direction." Sign in to save SAT PDF — $25 GRE PDF — $25 TOEFL PDF — $25 ← imperative imperial → Study tips featuring "imperceptible" 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