Plain English Meaning

Part of the runway has been shut down — usually for construction or repair — so the start of the runway has been moved further along. Pilots can only use the runway from the new starting point onward. The closed-off section cannot be used for anything.

Full Definition

A runway threshold that has been temporarily moved down the runway, with the pavement behind it closed and unusable for takeoff, landing, or taxi. The closed portion is marked off with a runway closure marking (a yellow X) and the usable runway begins at the new threshold location.

Context Anchor

Seen in runway marking discussions, airport notices, and preflight planning when part of a runway is closed or unusable.

Derivation

‘Relocated’ comes from Latin re- (‘again’) and locare (‘to place’) — literally ‘placed again, in a new spot.’ That fits exactly: the threshold has been picked up and put down somewhere new on the runway.