VOCATIVE
vocative
(adjective) relating to a case used in some languages; “vocative verb endings”
vocative, vocative case
(noun) the case (in some inflected languages) used when the referent of the noun is being addressed
Source: WordNet® 3.1
Etymology
Adjective
vocative (comparative more vocative, superlative most vocative)
Of or pertaining to calling; used in calling or vocation.
(grammar) Used in address; appellative (said of that case or form of the noun, pronoun, or adjective, in which a person or thing is addressed). For example "Domine, O Lord"
Noun
vocative (plural vocatives)
(grammar) The vocative case
(grammar) A word in the vocative case
(rare) Something said to (or as though to) a particular person or thing; an entreaty, an invocation.
Source: Wiktionary
Voc"a*tive, a. Etym: [L. vocativus, fr. vocare to call.]
Definition: 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; as, Domine, O Lord.
Voc"a*tive, n. Etym: [L. vocativus (sc. casus): cf. F. vocatif.]
(Gram.)
Definition: The vocative case.
Source: Webster’s Unabridged Dictionary 1913 Edition