Definition.com
Relative time is a sensible, external, variable measure of duration by the means of motion.
Relative time is a sensible, external, variable measure of duration by the means of motion.
Relative time is the quantifiable, subjective, perceptual, observation-based, measurable version of time of the common people whereby quantities are perceived exclusively based on their relation to sensible objects.
Relative time is sensible, perceivable, external, variable, and is measured by means of motion (an hour, a day, a month, a year). It is opposed to mathematical time.