the GNU version of the Collaborative International Dictionary of English
adj. Such as to appall.
The Century Dictionary and Cyclopedia
Causing or fitted to cause dismay or horror: as, an appalling accident; an appalling sight.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. causing consternation
n. an experience that appalls
Word Usage
"U.S. President Barack Obama said the world is outraged by what he called the "appalling" violence against the Libyan people and is urging Gadhafi to step down."