Meaning of comitative

com•i•ta•tive

Pronunciation: (kom'i-tā"tiv, -tu-tiv), [key]
— Gram. Gram.
—adj.
  1. noting a case whose distinctive function is to indicate accompaniment.
—n.
  1. the comitative case.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.