Dictionary
voc•a•tive
Pronunciation: (vok'u-tiv), [key]—
adj.
1. Gram.(in certain inflected languages, as Latin) noting or pertaining to a case used to indicate that a noun refers to a person or thing being addressed.
2. of, pertaining to, or used in calling, specifying, or addressing.
—
n. Gram.
1. the vocative case.
2. a word in the vocative, as Latin
Paule “O Paul.”
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.