TOEFL IELTS core Definition The central or most important part of something. Example "The core of the problem lies in poor communication." Sign in to save TOEFL PDF — $25 IELTS PDF — $25 ← cordon cork → Study tips featuring "core" 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