Frondeur definition is - rebel, malcontent. Recent Examples on the Web At the end of January, Valls was defeated in the Socialist Party race by Benoît Hamon, a dapper frondeur, a member of a rebel faction. — Elisabeth Zerofsky, The New Yorker, "France’s Outsider Candidates Seize the Presidential Race," 8 Feb. 2017 These example sentences are selected automatically from various online news ...