The quantity of motion in a moving body, being always proportioned to the quantity of matter multiplied into the velocity; impetus.
- 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.