Which of the following defines a 'slide' in terms of locomotor movements?

A 'slide' is indeed best defined as a lateral movement that involves shifting weight. This type of locomotor movement typically occurs when one foot steps to the side while the other foot follows, maintaining a continuous flow. The primary characteristic of a slide is the smooth transition from one side to the other, with the body's weight shifting laterally, helping to develop balance and coordination.

In the context of body movements, distinguishing the slide from other forms is significant. A forward movement that requires a jump refers to a leap, which is an entirely different type of locomotion involving an upward and forward motion. A vertical movement of the body does not capture the essence of a slide as it typically involves movements like jumping or reaching upward, without the lateral aspect. Lastly, a backward movement on one's feet would define a backward slide or retreat, but it does not accurately represent the lateral nature of a slide. Therefore, the definition that encompasses the characteristics of a slide is that it involves a lateral shift in weight.