What is the meaning of Vocative?

Of or pertaining to calling; used in calling or vocation.

Used in address; appellative; said of the case or form of the noun, pronoun, or adjective by which a person or thing is addressed.

The vocative case

A word in the vocative case

A vocative expression

Something said to (or as though to) a particular person or thing; an entreaty, an invocation.

feminine plural of vocativo

vocative masculine singular of vocātīvus

plural of vocativ

Source: wiktionary.org