SAT TOEFL IELTS extensive Definition Large in area, scale, or scope. Example "The firefighters faced extensive damage after the blaze was extinguished." Sign in to save SAT Quiz → TOEFL Quiz → IELTS Quiz → ← extension extent → Study tips featuring "extensive" 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