Define chat group (noun) and get synonyms. What is chat group (noun)? chat group (noun) meaning, pronunciation and more by Macmillan betatrain.eur: eskorte. Define Group chat. Group chat synonyms, Group chat pronunciation, Group chat translation, English dictionary definition of Group chat. n. Computers. a branch of a computer system in which participants can engage in live discussions with one another. Noun 1. chat room - a site on the Mangler: eskorte. That one group of people who keep on inviting you to a group chat and talk about useless stuff and basically just buzzes you phone all day but you can't leave because they just invite you betatrain.eur: eskorte.