Plain English Meaning
The front window of the airplane that the pilot looks out of.
Full Definition
The transparent panel at the front of the cockpit that the pilot looks through during flight, providing forward visibility while protecting occupants from wind, weather, and debris.
Context Anchor
Seen in landing, approach, and visual-reference discussions, especially when the pilot is judging where an outside point appears in the front window.
Derivation
From 'wind' plus 'screen' (something that blocks or shields). The British term for what Americans often call a 'windshield' on a car. In aviation, 'windscreen' is the more common term worldwide.