# velocity

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## ve·loc·i·ty

(və-lŏs′ĭ-tē)
n. pl. ve·loc·i·ties
1. Rapidity or speed of motion; swiftness.
2. Physics A vector quantity whose magnitude is a body's speed and whose direction is the body's direction of motion.
3.
a. The rate of speed of action or occurrence.
b. The rate at which money changes hands in an economy.

[Middle English velocite, from Old French, from Latin vēlōcitās, from vēlōx, vēlōc-, fast; see weg- in Indo-European roots.]

## velocity

(vɪˈlɒsɪtɪ)
n, pl -ties
1. speed of motion, action, or operation; rapidity; swiftness
2. (Units) physics a measure of the rate of motion of a body expressed as the rate of change of its position in a particular direction with time. It is measured in metres per second, miles per hour, etc. Symbol: u, v or w
3. physics (not in technical usage) another word for speed3
[C16: from Latin vēlōcitās, from vēlōx swift; related to volāre to fly]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

## ve•loc•i•ty

(vəˈlɒs ɪ ti)

n., pl. -ties.
1. rapidity of motion, action, or operation; swiftness; speed.
2. Mech. the time rate of change of position of a body in a specified direction.
[1540–50; < Latin vēlōcitās speed. See velocipede, -ty2]
syn: See speed.

## ve·loc·i·ty

(və-lŏs′ĭ-tē)
The rate at which an object moves in a specified direction.
Usage We normally think of velocity as the speed at which an object is traveling. But in physics, velocity and speed are not the same. Like speed, velocity refers to the rate at which an object is moving—the distance per unit of time. But velocity in physics also includes the direction in which the object is moving, whereas direction has no bearing on an object's speed. For example, if two cars were driving at a rate of 50 miles per hour, and both headed due north, you could rightly say that they were both traveling at the same speed and at the same velocity. But if one of the cars were to turn west at a certain point, continuing at the same rate of 50 miles per hour, you could only say that they were traveling at the same speed, not at the same velocity. Similarly, traveling around a curve, a car may maintain the same speed throughout, but its velocity will be constantly changing. This change in velocity over time is called acceleration.

## velocity

Rate of motion in a particular direction.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
ThesaurusAntonymsRelated WordsSynonymsLegend:
 Noun 1 velocity - distance travelled per unit time  speedangular velocity - (physics) the rate of change of the angular position of a rotating body; usually expressed in radians per second or radians per minuteairspeed - the speed of an aircraft relative to the air in which it is flyingescape velocity - the minimum velocity needed to escape a gravitational fieldgroundspeed - the speed of an aircraft relative to the groundhypervelocity - excessive velocity; "the meteorites struck the earth with hypervelocity impacts"muzzle velocity - the velocity of a projectile as it leaves the muzzle of a gunpeculiar velocity - velocity with respect to the local standard of restradial velocity - velocity along the line of sight toward or away from the observerlight speed, speed of light, c - the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per secondsteerageway - (nautical) the minimum rate of motion needed for a vessel to be maneuveredterminal velocity - the constant maximum velocity reached by a body falling through the atmosphere under the attraction of gravityrate - a magnitude or frequency relative to a time unit; "they traveled at a rate of 55 miles per hour"; "the rate of change was faster than expected"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.

## velocity

noun the velocity at which the planets orbit
Collins Thesaurus of the English Language – Complete and Unabridged 2nd Edition. 2002 © HarperCollins Publishers 1995, 2002

## velocity

noun
Rate of motion or performance:
Informal: clip.
Translations
سُرْعَه
rychlost
hastighedvelocitet
nopeusvauhti
hraîi
ātrums
farthastighet

## velocity

[vɪˈlɒsɪtɪ] N
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

## velocity

[vɪˈlɒsəti] n
Collins English/French Electronic Resource. © HarperCollins Publishers 2005

## velocity

Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

## velocity

[vɪˈlɒsɪtɪ] nvelocità f inv
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995

## velocity

(vəˈlosəti) noun
speed, especially in a given direction.
Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.
References in classic literature ?
What will be the period of transit of the projectile when endowed with sufficient initial velocity? and, consequently, at what moment ought it to be discharged in order that it may touch the moon at a particular point?
The definition of a "momentary thing" involves problems concerning time, since the particulars constituting a momentary thing will not be all simultaneous, but will travel outward from the thing with the velocity of light (in case the thing is in vacuo).
"But," rejoined the officer, "could any balloon withstand the wear and tear of such velocity?"
"This model (which, through want of time, we have necessarily described in an imperfect manner,) was put in action at the Adelaide Gallery, where it accomplished a velocity of five miles per hour; although, strange to say, it excited very little interest in comparison with the previous complex machine of Mr.
Presently, as I went on, still gaining velocity, the palpitation of night and day merged into one continuous greyness; the sky took on a wonderful deepness of blue, a splendid luminous color like that of early twilight; the jerking sun became a streak of fire, a brilliant arch, in space; the moon a fainter fluctuating band; and I could see nothing of the stars, save now and then a brighter circle flickering in the blue.
The canoe whirled with each cunning evolution of the chase, like a bubble floating in a whirlpool; and when the direction of the pursuit admitted of a straight course the little bark skimmed the lake with a velocity that urged the deer to seek its safety in some new turn.
"Just so," said Nicholl; "it is from that point that we must calculate the velocity, since we know already that the velocity at departure was exactly one and a half times more than on leaving the atmosphere."
On the contrary he gazed joyfully, his eyes moist with tears, at this bright comet which, having traveled in its orbit with inconceivable velocity through immeasurable space, seemed suddenly- like an arrow piercing the earth- to remain fixed in a chosen spot, vigorously holding its tail erect, shining and displaying its white light amid countless other scintillating stars.
My speed was so great that I could see nothing about me but a blurred and indistinct sheet of smooth and frozen snow, that rushed past me with express-train velocity.
It was thus with the Pequod's; at almost every shock the helmsman had not failed to notice the whirling velocity with which they revolved upon the cards; it is a sight that hardly any one can behold without some sort of unwonted emotion.
(which I naturally assumed to be Women) interspersed with other Beings still smaller and of the nature of lustrous points -- all moving to and fro in one and the same Straight Line, and, as nearly as I could judge, with the same velocity.
Presently a great hole was torn in the hull of one of the immense battle craft from the Zodangan camp; with a lurch she turned completely over, the little figures of her crew plunging, turning and twisting toward the ground a thousand feet below; then with sickening velocity she tore after them, almost completely burying herself in the soft loam of the ancient sea bottom.

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