/ Dictionary / Index I inessive: Meaning and Definition of Find definitions for: in•es•sive Pronunciation: (in-es'iv), [key] — Gram. Gram. —adj. noting a case, as in Finnish, whose distinctive function is to indicate place in or within which. —n. the inessive case. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. inessential inestimable Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language