/ Dictionary / Index E Eigen: Meaning and Definition of Find definitions for: Ei•gen Pronunciation: (ī'gun), [key] born 1927, German chemist: Nobel prize 1967. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: eigen (Thesaurus) Eiffel Tower eigenfunction Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language