Breadcrumb Home > Dictionary > Index I imperil: Meaning and Definition of Find definitions for: im•per•il Pronunciation: (im-per'ul), [key] — -iled, -il•ing -illed, -il•ling. to put in peril or danger; endanger. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: imperil (Thesaurus) Imperial Valley imperious TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: pentimento Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language