/ Dictionary / Index A Atum: Meaning and Definition of Find definitions for: A•tum Pronunciation: (ä'tum), [key] — n. Egyptian Religion. a primeval god who by himself begot Shu and Tefnut: the original god of the Ennead. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Atty. Gen. ATV Related Content Daily Word Quiz: garrulous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language