TOEFL IELTS grin Definition A broad smile, often showing pleasure or amusement. Example "The child had a wide grin after winning the game." Sign in to save TOEFL PDF — $25 IELTS PDF — $25 ← grimace grind → Study tips featuring "grin" 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