To fill with consternation or dismay. See Synonyms at dismay.(verb-transitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "appall" in a sentence
"Somtow himself warned that the new opera, inspired by American action movies, might "appall" some of his fellow Thais."
"It's no wonder that the corporate elitists who actually run the Party disgust and appall themselves whenever they have to go out and appeal to the base and deal with its leaders."
"Under the old eyes of a principal whose narrow glance is ample to subdue but not appall, the children spill around the skinned and limbless maple as if outside the temple of a declining god of simple rituals easily met."