GRE TOEFL IELTS flock Definition A group of birds or sheep; to gather or move together in a group. Example "A flock of geese flew south for the winter." Sign in to save GRE Quiz → TOEFL Quiz → IELTS Quiz → ← float floe → Study tips featuring "flock" Audit Your Own Writing to Find Gaps Write GRE Words Into Your Own Sentences TOEFL Academic Vocabulary: Study by Topic Related words GRE swill GRE taper GRE testy GRE abacus SAT abase GRE abash GRE abate GRE abbreviate GRE abbreviation SAT abdicate SAT abdomen GRE abduct