/ Dictionary / Index I i.p.h.: Meaning and Definition of Find definitions for: i.p.h. Pronunciation: [key] impressions per hour. inches per hour. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ipecac syrup Iphianassa 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