mutinous Syllabification: (mu·ti·nous)Pronunciation: /ˈmyo͞otn-əs/Translate mutinous | into German | into Italian Definition of mutinous adjective (of a soldier or sailor) refusing to obey the orders of a person in authority. willful or disobedient:Antoinette looked mutinous, but she obeyedDerivatives mutinously adverb Origin: late 16th century: from obsolete mutine 'rebellion' (see mutiny) + -ousmutinous in other Oxford dictionaries Definition of mutinous in the British & World English dictionary