/ Dictionary / Index E eidos: Meaning and Definition of Find definitions for: ei•dos Pronunciation: (ī'dos, ā'-), [key] — pl. ei•de the formal content of a culture, encompassing its system of ideas, criteria for interpreting experience, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: eidos (Thesaurus) eidolon Eiffel 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