/ Dictionary / Index H Holter monitor: Meaning and Definition of Find definitions for: Hol'ter mon"itor Pronunciation: (hōl'tur), [key] a portable electrocardiograph worn by a patient over an extended period of time to assess the effects on heart function of activities of daily living. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. holt holus-bolus Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language