/ Dictionary / Index I Ilion: Meaning and Definition of Find definitions for: Il•i•on Pronunciation: (il'ē-un, -on"), [key] — n. Greek name of ancient Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ilion (Thesaurus) ilio- -ility Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language