Breadcrumb Home > Dictionary > Index A appalling: Meaning and Definition of Find definitions for: ap•pall•ing Pronunciation: (u-pô'ling), [key] — adj. causing dismay or horror: an appalling accident; an appalling lack of manners. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: appalling (Thesaurus) appall Appaloosa TrendingHere are the facts and trivia that people are buzzing about. Ramadan and Eid al-Fitr 42 Best War Movie Quotes Current Events This Week: March 2023 Recycling Facts William Shakespeare Worst U.S. Forest Fires ✖ Related Content Daily Word Quiz: manoamano Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language