- The definition of grumpy is irritable or grouchy.
An example of grumpy is a person who is always complaining and unhappy.
A grumpy old man.Licensed from iStockPhoto
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.
adjective grump·i·er, grump·i·est
- grumpˈi·ly adverb
- grumpˈi·ness noun