/ Dictionary / Index I -ition: Meaning and Definition of Find definitions for: -ition Pronunciation: [key] a compound suffix of nouns, being -tion with a preceding original or formative vowel, or, in other words, a combination of andexpedition; extradition. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. itinerate -itious 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