Step-by-step explanation:
Time dilation: It is defined as the difference in the elapsed time which is measured by the two observer. It is due to the difference in the velocity relative to each other. It is the theory of special relativity.
Time dilation is an apparent loss of time of a moving clock as observed by the observer who is at rest.
Suppose, a clock is moving relative to an observer. It measures the time slower than the clock at rest in the observer frame of reference.