və̇ˈläsəd.ē, -ətē, -i noun
( -es )
Etymology: Middle French velocité, from Latin velocitat-, velocitas, from veloc-, velox quick + -itat-, -itas -ity; akin to Latin veles light-armed foot soldier, vehere to carry, convey — more at way
1. : quickness of motion : swiftness , speed , celerity , rapidity — used chiefly of inanimate things
the velocity of a bullet
the velocity of flow of water
velocity of a train
the velocity of sound
2.
a.
(1) : time rate of linear motion in a given direction : a vector quantity equal to speed in a particular direction and relative to a stated frame of reference — compare speed 2b
(2) : angular velocity
b. : the rate at which a chemical reaction progresses
3. : rate of occurrence or action : rapidity
velocities of inhibition of bacterial growth by sulfonamide — Journal American Medical Association
if the blood vessels were in a dilated condition the velocity of heat transfer was reduced — F.A.Geldard
a book having a high sales velocity
: rate of turnover
velocity of money