What is the definition of velocity?

Answer 1

Velocity is a measure of the speed of an object that is moving in a specific direction.Imagine walking across the room. If you walk in the same direction and do not change speed, your velocity remains constant until you stop moving. If you keep a constant speed, but change direction while walking, your velocity changes. If you walk in the same direction but slow down and speed up while walking, your velocity changes.

Velocity is a vector quantity that describes the speed and direction that an object is moving. It is the same as "speed" except that it includes the direction of the object as well. Speed is the rate of change of distance.

In common language, velocity is often used imprecisely to mean "speed".