/ Dictionary / Index A AUM: Meaning and Definition of Find definitions for: AUM Pronunciation: [key] air-to-underwater missile. Aum Pronunciation: (ōm), [key] — n. Hinduism. Om. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: aum (Thesaurus) aulos aumbry Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language