/ Dictionary / Index O omnium-gatherum: Meaning and Definition of Find definitions for: om•ni•um-gath•er•um Pronunciation: (om"nē-um-ga'ur-um), [key] — pl. -ums. a miscellaneous collection. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: omnium-gatherum (Thesaurus) omniscient omnivore Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language