- The definition of a throughway, often spelled thruway, is a highway that has limited entrances and exits.
An example of a throughway is a toll road that you pay to use.
throughway 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.
throughway definition by American Heritage Dictionary
Variant of thruway.