windscreen

Short definition from Wiktionary

Noun

1. 1
   A transparent screen made of glass, located at the front of a vehicle in order to protect its occupants from the wind and weather.
2. 2
   A cover for a microphone to exclude airy noises such as wind and breathing.
3. 3
   A lightweight aerodynamic fairing mounted on the nose of an armor-piercing shell to reduce drag and increase range.
4. 4
   A draught screen at the side of a passenger train doorway.

Verb

1. 1
   To install a windscreen on.