velocity

noun5

1. •
   A rapidity of motion.

   • The train was travelling at a slower velocity than usual.
2. •
   The value corresponding to how hard a key is struck on a MIDI controller or keyboard.
3. •
   A vector quantity that denotes the rate of change of position with respect to time, combining speed with a directional component.

   • A car racing in a circle may retain the same speed while continually changing its velocity.
4. •
   The rate of occurrence.
5. •
   The number of times that an average unit of currency is spent during a specific period of time.