Deflection refers to the change in direction of an object when a force is applied to it. For example, when a soccer ball is kicked, it moves in a different direction than it was originally traveling. This change occurs because the force from the kick alters the ball's path, causing it to deflect away from its initial trajectory. In engineering, deflection is an important concept when designing structures like bridges or buildings. Engineers must consider how materials will bend or deform under weight or pressure. For instance, a bridge may deflect slightly when cars drive over it, but it must be designed to ensure that this deflection remains within safe limits.