psycholinguistics Syllabification: (psy·cho·lin·guis·tics)Pronunciation: /ˌsīkōliNGˈgwistiks/Definition of psycholinguistics noun [treated as singular] the study of the relationships between linguistic behavior and psychological processes, including the process of language acquisition. Derivatives psycholinguistPronunciation: /-ˈliNGgwist/ noun psycholinguistic adjective psycholinguistics in other Oxford dictionaries Definition of psycholinguistics in the British & World English dictionary