What is defined as a threshold located at a point on the runway other than the designated beginning of the runway?

The term that defines a threshold located at a point on the runway other than the designated beginning of the runway is the displaced threshold. This term is used in aviation to indicate a point on the runway where landing operations are not permitted, but aircraft may take off. A displaced threshold might be established for various reasons, such as obstacles or environmental concerns that necessitate moving the effective landing starting point further down the runway.

In contrast, options like extended threshold or final threshold refer to concepts that do not align with the definition of a threshold being moved away from the designated beginning of the runway, while a temporary threshold implies a scenario that is not permanent and could cause confusion in operations. Thus, the concept of a displaced threshold accurately represents the idea of relocating the start of the available landing distance without altering the physical length of the runway itself.