SAT TOEFL IELTS infinite Definition Limitless or endless in space, extent, or time; immeasurable. Example "The universe may contain infinite galaxies." Sign in to save SAT Quiz → TOEFL Quiz → IELTS Quiz → ← infiltrate infinitesimal → Study tips featuring "infinite" Spot the Vocabulary Trap in Every Question Audit Your Own Writing to Find Gaps 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