/ Dictionary / Index I inarch: Meaning and Definition of Find definitions for: in•arch Pronunciation: (in-ärch'), [key] — v.t. Hort. to graft by uniting a growing branch to a stock without separating the branch from its parent stock. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. inaptitude inarguable Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language