1. (n.) The act driving forward or away\; the act or process of propelling; as, steam propulsion.

2. (n.) An impelling act or movement.

action and reaction aeromotor atomic power bunt butt clout compulsion drive driving force electric power electropower horsepower hydraulic power hydroelectric power impellent impelling force impetus impulse impulsion incentive incitement irresistible force jet power jet propulsion manpower moment momentum motive power nuclear power piston power power power plant pressure propelling propelment pulsion push pushing ram-jet propulsion reaction reaction propulsion resojet propulsion rocket power rocket propulsion shove shoving shunt solar power steam power thermonuclear power thrust turbojet propulsion water power