Static thrust refers to the amount of thrust produced when the engine is:

Static thrust is defined as the thrust produced by an engine when it is stationary, meaning that the aircraft is at a standstill and the engine is running at a specific power setting. This measurement is taken while the aircraft is on the ground and the engines are operating without any forward movement. It is critical in assessing the engine's performance characteristics since it reflects the engine's ability to produce thrust against the resistance of the surrounding atmosphere without the additional dynamics introduced by aircraft movement.

In contrast, thrust produced during flight conditions, like during a climb or descent, involves additional factors such as airspeed and dynamic pressure, which can significantly alter the amount of thrust that can be effectively utilized by the aircraft.