Definition of time-lag:
(n) :
(uncountable) The inevitable progression into the future with the passing of present and past events.
(n) :
(uncountable) The feeling of the passage of events and their relative duration, as experienced by an individual.
(n) :
(physics, usually uncountable) A dimension of spacetime with the opposite metric signature to space dimensions; the fourth dimension.
(n) :
(physics, uncountable) Change associated with the second law of thermodynamics; the physical and psychological result of increasing entropy.
(n) :
(physics, uncountable, reductionist definition) The property of a system which allows it to have more than one distinct configuration.
(n) :
A duration of time.