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  1. Home /
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  3. English Dictionary /
  4. velocity

velocity

/vəˈlɒsəti/
speed in a given direction

The rocket's velocity reached 17,500 mph during launch.

This describes both the speed and direction of the rocket.


technical

The rate of change of position with respect to time, including direction

In physics, velocity is a vector quantity that describes both speed and direction.

This means it accounts for both how fast something is moving and the path it's taking.

In physics, velocity differs from speed because it includes direction.

general

The speed at which something moves, often in a specific context

The car's velocity increased as it accelerated down the highway.

Here, velocity refers to how fast the car is moving in a particular direction.

In everyday language, velocity is often used synonymously with speed.

Collocations

high velocityextremely fast speedterminal velocitymaximum speed reached by a falling objectescape velocityminimum speed needed to escape a gravitational field

Synonyms

speedrapiditycelerity

Antonyms

stillnessinertiaslowness

Related Phrases

velocity vectorphrase
a mathematical representation of velocity
change in velocityphrase
acceleration

Pro Tip

Physics vs. Common Usage

Remember that in physics, velocity includes direction, while speed does not.

Gold Rule

Vector Nature

Velocity is a vector quantity, meaning it has both magnitude and direction.

Word Origin

From Latin 'velocitas', meaning 'swiftness' or 'speed'

Usage Notes

In physics, velocity is a vector quantity, while speed is a scalar. In common usage, the terms are often interchangeable.

Word Breakdown

velo
swift
root
+
-city
quality of
suffix
English Dictionary
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