psycholinguisticsPronunciation: /ˌsʌɪkəʊlɪŋˈgwɪstɪks/Definition of psycholinguistics noun [treated as singular] the study of the relationships between linguistic behaviour and psychological processes, including the process of language acquisition. Derivatives psycholinguistPronunciation: /-ˈlɪŋgwɪst/ noun psycholinguistic adjective psycholinguistics in other Oxford dictionaries Definition of psycholinguistics in the US English dictionary