Plain English Meaning
What the runway is actually made of -- paved, gravel, grass, dirt, or water -- and what shape it is in.
Full Definition
The material that makes up the usable landing and takeoff surface of a runway, such as concrete, asphalt, gravel, turf, dirt, or water. Chart Supplements list runway surface using standard codes so pilots know what they will be operating on before arrival.
Context Anchor
Seen in Chart Supplements and airport information, usually with runway length, lighting, and other runway details.
Why Pilots Care
Surface type affects braking, tire wear, required takeoff and landing distances, and handling in wet or soft .