Vŏc'a-tīve1, a.
a. [Lat. vocativus, from vocare, to call.] Relating to, or used in, calling; used in address;—said of that case of the noun, pronoun, or adjective, in which a person or thing is addressed.
2 entries under this word
Vocative
Vōc'a-tive2, n.
n. [Lat. vocativus (sc. casus), It., Sp., & Pg. vocativo, Pr. vocatiu, Fr. vocatif.] (Gram.) The case, in any language, in which a word is put when the person or thing is addressed; as, Domine, O Lord.