/ Dictionary / Index I imperious: Meaning and Definition of Find definitions for: im•pe•ri•ous Pronunciation: (im-pēr'ē-us), [key] — adj. domineering in a haughty manner; dictatorial; overbearing: an imperious manner; an imperious person. urgent; imperative: imperious need. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: imperious (Thesaurus) imperil imperishable Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language