Velocity is defined as:

Velocity is defined as the speed of an object in a specific direction. This means that it is a vector quantity, which not only tells you how fast something is moving but also the direction in which it is moving. For example, if a car is traveling north at 60 kilometers per hour, its velocity would be 60 km/h to the north. Understanding this concept is crucial, especially in fields such as engineering and physics, where directional movement can significantly affect system performance and safety.

The other definitions do not encompass the directional aspect that characterizes velocity. While they reference speed and distance, they lack the critical component that specifies orientation, which differentiates velocity from mere speed, making it essential to grasp the definition correctly in practical applications.