libelous Syllabification: (li·bel·ous)Pronunciation: /ˈlībələs/ (British libellous)Translate libelous | into French | into German | into Italian Definition of libelous adjective containing or constituting a libel:a libelous newspaper storyDerivatives libelously adverb libelous in other Oxford dictionaries Definition of libelous in the British & World English dictionary