metalinguistics Syllabification: (met·a·lin·guis·tics)Pronunciation: /ˌmetəˌliNGˈgwistiks/Definition of metalinguistics noun [treated as singular] the branch of linguistics that deals with metalanguages, self-reference in language, and the philosophy of science as it applies to linguistics. Derivatives metalinguistic adjective metalinguistics in other Oxford dictionaries Definition of metalinguistics in the British & World English dictionary