bulwark Syllabification: (bul·wark)Pronunciation: /ˈbo͝olˌwərk/Translate bulwark | into Italian Definition of bulwark noun 1a defensive wall. a person, institution, or principle that acts as a defense:the security forces are a bulwark against the breakdown of society 2 (usually bulwarks) an extension of a ship’s sides above the level of the deck. Origin: late Middle English: from Middle Low German and Middle Dutch bolwerk; related to bole1 and workRemember that bulwark is spelled with a single l.bulwark in other Oxford dictionaries Definition of bulwark in the British & World English dictionary