license plate 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 numbered or lettered metal tag displayed on a motor vehicle, indicating that the vehicle has been registered with the state or country and may be driven on public streets and highways
license plate definition by American Heritage Dictionary
A rectangular, usually metal plate that bears a sequence of numbers, letters, or both and is issued by a government to identify an officially registered vehicle.