/ Dictionary / Index E eidolon: Meaning and Definition of Find definitions for: ei•do•lon Pronunciation: (ī-dō'lun), [key] — pl. -la -lons. a phantom; apparition. an ideal. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. eidetic eidos Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language