Momentum

(mō-měn'təm) n. pl. mo·men·ta (-tə) or mo·men·tums
Symbol p Physics A measure of the motion of a body equal to the product of its mass and velocity. Also called linear momentum.
Impetus of a physical object in motion.
Impetus of a nonphysical process, such as an idea or a course of events: The soaring rise in interest rates finally appeared to be losing momentum.
Philosophy An essential or constituent element; a moment.