The thick, protective glass at the front of a car is its windshield. If it's hard to see clearly when you're driving, you may need new glasses — or it might just be time to clean the windshield.
The word windshield is the North American version of what Brits call the windscreen. Whether you're traveling in a bus, airplane, or taxi, there's a windshield protecting you and the driver (or pilot) from flying debris. Modern windshields are made of extremely strong, shatter-proof glass. When rain falls, pouring against the windshield, be sure to turn on the windshield wipers!