01 n. Quickness of motion; swiftness; speed; celerity; rapidity; as, the velocity of wind; the velocity of a planet or comet in its orbit or cour…
pl.
Velocities ((#))
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1.
Quickness of motion; swiftness; speed; celerity; rapidity; as, the velocity of wind; the velocity of a planet or comet in its orbit or course; the velocity of a cannon ball; the velocity of light.
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2.
Rate of motion; the relation of motion to time, measured by the number of units of space passed over by a moving body or point in a unit of time, usually the number of feet passed over in a second. See the Note under Speed.(Mech.) See: Speed
Phrases & compounds
Angular velocity —
See under Angular.
Initial velocity —
the velocity of a moving body at starting; especially, the velocity of a projectile as it leaves the mouth of a firearm from which it is discharged.
Relative velocity —
the velocity with which a body approaches or recedes from another body, whether both are moving or only one.
Uniform velocity —
velocity in which the same number of units of space are described in each successive unit of time.
Variable velocity —
velocity in which the space described varies from instant to instant, either increasing or decreasing; -- in the former case called accelerated velocity, in the latter, retarded velocity; the acceleration or retardation itself being also either uniform or variable.
Virtual velocity —
See under Virtual.