a. [ L. vocativus, fr. vocare to call. ] Of or pertaining to calling; used in calling; specifically (Gram.), used in address; appellative; -- said of that case or form of the noun, pronoun, or adjective, in which a person or thing is addressed;
n. [ L. vocativus (sc. casus): cf. F. vocatif. ] (Gram.) The vocative case. [ 1913 Webster ]