/ Dictionary / Index A aeon: Meaning and Definition of Find definitions for: ae•on Pronunciation: (ē'un, ē'on), [key] — n. (in Gnosticism) one of a class of powers or beings conceived as emanating from the Supreme Being and performing various functions in the operations of the universe. eon. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: aeon (Thesaurus) Aeolus aeonian Related Content Daily Word Quiz: torrid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language