Definition of flange noun from the Oxford Advanced Learner's Dictionary



BrE BrE//flændʒ//
; NAmE NAmE//flændʒ//
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an edge that sticks out from an object and makes it stronger or (as in a wheel of a train) keeps it in the correct position Word Originlate 17th cent.: perhaps based on Old French flanchir ‘to bend’.
See the Oxford Advanced American Dictionary entry: flange