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



BrE BrE//ˈɡædflaɪ//
; NAmE NAmE//ˈɡædflaɪ//
(pl. gadflies) (usually disapproving)
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a person who annoys or criticizes other people in order to make them do something He was a political gadfly, turning up at city council meetings and complaining about the waste of taxpayers’ money. Word Originlate 16th cent.: from gad, or obsolete gad ‘goad, spike’, from Old Norse gaddr, of Germanic origin; related to yard, the unit of measurement.
See the Oxford Advanced American Dictionary entry: gadfly