- The definition of a cookie sheet is a baking tool consisting of a relatively flat piece of material (usually metal and often with handles) onto which cookies and other items are placed to be cooked in the oven.
An example of a cookie sheet is the silver tray on which you bake your chocolate chip cookies in the oven.
Cookies on a cookie sheet.
cookie sheet definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a flat metal pan on which cookies are baked
cookie sheet definition by American Heritage Dictionary
A baking sheet.