Vocative (noun)

A grammatical case used to indicate the person or thing being addressed in a sentence.

Origin:

From latin vocativus, from vocare "to call".

Examples:

1. In the sentence "John, come here," "John" is in the vocative case.
2. The vocative form of the word "father" in Latin is "pater".
3. In this language, the vocative case is indicated by a special ending on the noun.
4. The vocative form of the word "queen" is "your majesty".
5. The vocative case is used to give a direct address to the person or thing being spoken to.