momentum Definition

momentum
noun momentums, momenta

1a. Continuous speed of progress; impetus;

Example: The campaign gained momentum
Thesaurus: impetus, force, drive, impulse, energy, incentive, urge, push, thrust.
1b. The force that an object gains in movement.
2. physics.
The product of the mass and the velocity of a moving object. See also angular momentum, linear momentum.

Etymology: 17c: Latin, meaning ‘movement'.