noun ve·loc·i·ty \və-ˈlä-sə-tē, -ˈläs-tē\

: quickness of motion

plural ve·loc·i·ties

Full Definition of VELOCITY

a :  quickness of motion :  speed <the velocity of sound>
b :  rapidity of movement <[my horse's] strong suit is grace & personal comeliness, rather than velocity — Mark Twain>
c :  speed imparted to something <the power pitcher relies on velocity — Tony Scherman>
:  the rate of change of position along a straight line with respect to time :  the derivative of position with respect to time
a :  rate of occurrence or action :  rapidity <the velocity of historical change — R. J. Lifton>
b :  rate of turnover <the velocity of money>

Examples of VELOCITY

  1. particles moving at high velocities
  2. measuring the velocity of sound
  3. the velocity of a bullet

Origin of VELOCITY

Middle French velocité, from Latin velocitat-, velocitas, from veloc-, velox quick; probably akin to Latin vegēre to enliven — more at wake
First Known Use: 15th century

Other Physics Terms

amplitude, centrifugal, centripetal, convection, gradient, hysteresis, kinetic, lase, quantum
VELOCITIES Defined for Kids


noun ve·loc·i·ty \və-ˈlä-sə-tē\
plural ve·loc·i·ties

Definition of VELOCITY for Kids

:  quickness of motion :  speed
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears