thrust -A force created by the engines to push an airplane through the air.
gross thrust - The thrust developed by the engine, not taking into account any presence of initial-air-mass momentum.
net thrust - The effective thrust developed by the engine during the flight, taking into consideration the initial momentum of the aircraft speed mass prior to entering the influence of the engine.
specific fuel consumption thrust - The fuel that the engine must burn per hour to generate 1 LB of thrust.
static thrust - Thrust developed by engine, without any initial air-mass momentum due to engine's static state.
thrust reverser - A device used to partially reverse the flow of the engine's nozzle discharge gases and thus create a thrust force in the opposite to normal direction.