Question

What is Velocity? And be pacific clear about it please.

Answer 1

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 vlcits, from vlx, vlc-, fast; see weg- in Indo-European roots.]

The American Heritage® Dictionary of the English Language, Fourth Edition copyright ©2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
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 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003
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.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
velocity (v-ls-t)
The speed and direction of motion of a moving body. Velocity is a vector quantity.

Answer 2

Thanks!