The American Heritage® Dictionary of the English Language, 4th Edition
n. A small grimace; a pout.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a disdainful grimace
Word Usage
"Sophy snatched at the doll petulantly, and made what the French call a moue at the good man as she suffered her grandfather to replace her on the sofa."