- The definition of wily is something or someone who is cunning and sly.
An example of wily is a bank robber whose picture never gets caught on a surveillance camera.
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.
adjective wi·li·er, wi·li·est
- wilˈi·ly adverb
- wilˈi·ness noun