/ Dictionary / Index H holus-bolus: Meaning and Definition of Find definitions for: ho•lus-bo•lus Pronunciation: (hō'lus-bō'lus), [key] — adv. all at once; altogether. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Holter monitor holy Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language