/ Dictionary / Index I imper.: Meaning and Definition of Find definitions for: imper. Pronunciation: [key] imperative. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. impenitent imperatival Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language