acceleration
1. [ noun ] an increase in speed
Examples:

"modern science caused an acceleration of cultural change"

Related terms: deceleration speed pickup precipitation accelerate
2. [ noun ] the act of accelerating; increasing the speed
Synonyms: speedup quickening
Related terms: speed accelerate accelerate
3. [ noun ] (physics) a rate of change of velocity
Related terms: rate centripetal_acceleration physics
Similar spelling:   accelerating
  accelerative
  accelerate
  accelerator
  accelerated
  accelerando
  acceleratory
  accelerometer