co·mit·a·tive (kə-mĭt'ə-tĭv, kŏm'ĭ-tā'-) adj. Of, relating to, or being the grammatical case indicating accompaniment in some languages, as in Finnish professorine "(along) with the professor." n.
The comitative case.
A word or form in the comitative case.
[Latin comitārī, comitāt-, to accompany (from comes, comit-, companion; see count2) + -ive.]