TOEFL IELTS occur Definition To happen or take place; to come into existence. Example "Accidents can occur even when you're being careful." Sign in to save TOEFL PDF — $25 IELTS PDF — $25 ← occupy occurrence → Study tips featuring "occur" TOEFL Academic Vocabulary: Study by Topic Boost Your IELTS Writing With Precise Vocabulary Related words TOEFL brighten GRE abash GRE abate GRE abbreviate GRE abbreviation SAT abdicate GRE abduct SAT abet GRE abhor GRE abide SAT abject TOEFL ablaze