The meaning of COLLOQUIAL is used in or characteristic of familiar and informal conversation; also : unacceptably informal. How to use colloquial in a sentence. Did you know? Colloquial definition : Characteristic of or appropriate to the spoken language or to writing that seeks the effect of speech; informal. colloquial meaning , definition , what is colloquial : language or words that are colloquial ar...: Learn more. Colloquial language is casual and conversational: it's the difference between "What are you going to do?" and "Whatchagonnado?"
