In the context of this discussion:
3. (Engineering / Aeronautics)a. a propulsive force produced by the fluid pressure or the change of momentum of the fluid in a jet engine, rocket engine, etc.
As i used the word thrust in the context of a GLIDER and wrongly assumed that people here would know that a glider doesn't have any rockets or jet engines and therefore was simply trying to show that the thrust in a conventional jet engine is replaced by momentum in a glider in certain circumstances.
so as a GLIDER does not have any other propulsive unit i was using the word thrust in its correct context.
sorry i should of realised this is just a troll fest and not actually based on real science.
GB