Entry 1 sense Webster, 1913 Colloquialize · Col·lo·qui·al·ize · IPA /kəˈləʊ.kwi.əˌlaɪz/ 01 v. t. To make colloquial and familiar; as, to colloquialize one's style of writing. 1. To make colloquial and familiar; as, to colloquialize one's style of writing.