Plain English Meaning

A runway that is shut for the time being, not for good. You'll know it's temporarily closed because there's a big yellow X laid out at each end. Don't land on it or take off from it while the X is there.

Full Definition

Runways that are not available for use for a limited period, marked with a yellow cross (X) placed at each end of the runway. The yellow X indicates the runway is closed but may be reopened, distinguishing it from a permanently closed runway, which is marked with white painted Xs at each end and at intervals along its length.

Context Anchor

Pilots encounter this during preflight planning, while listening to airport information, while receiving tower instructions, or when seeing closed-runway markings on the airport surface.