Plain English Meaning
It is the visibility reading taken at the far end of the runway — how far you can see down the runway once you are nearing the end of your landing or takeoff.
Full Definition
A Runway Visual Range measurement taken near the rollout (departure) end of the runway, indicating the visibility a pilot would have during the latter portion of a landing rollout or the end of a takeoff roll.
Context Anchor
Seen in instrument approach weather reports and low-visibility landing discussions when RVR values are reported for different parts of the runway.
Why Pilots Care
Allows pilots and dispatchers to confirm that visibility improves or remains adequate along the full length of the runway before committing to landing.