/ Dictionary / Index A -ation: Meaning and Definition of Find definitions for: -ation Pronunciation: [key] a combination of andused to form nouns from stems in (separation); on this model, used independently to form nouns from stems of other origin: starvation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. atingle atiptoe Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language