adjective. ['ˌɪnˈfɔrməl'] not formal.
adjective. ['ˌɪnˈfɔrməl'] not officially recognized or controlled.
adjective. ['ˌɪnˈfɔrməl'] used of spoken and written language.
adjective. ['ˌɪnˈfɔrməl'] having or fostering a warm or friendly and informal atmosphere.