momentum

noun

1. The quantity of motion of a moving body, measured as a product of its mass and velocity.

   C1
   • "The car gained momentum as it sped down the highway."B2
   • "In physics, momentum is conserved in a closed system."C1

2. A feeling or tendency that something will happen or be successful.

   B2
   • "The project has gained momentum with the new funding."B1
   • "The team's momentum carried them to victory in the finals."B2