TOEFL IELTS ensure Definition To make certain that something will occur or be the case. Example "Double-check your answers to ensure accuracy." Sign in to save TOEFL PDF — $25 IELTS PDF — $25 ← ensue entail → Study tips featuring "ensure" 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