TOEFL clog Definition To block or obstruct a passage; also, a type of wooden shoe. Example "Leaves and debris clogged the rain gutter." Sign in to save TOEFL PDF — $25 ← clockwise cloister → Study tips featuring "clog" TOEFL Academic Vocabulary: Study by Topic 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