a commercial product that refills a container with its appropriate contents; "he got a refill for his ball-point pen"; "he got a refill for his notebook"
a prescription drug that is provided again; "he got a refill of his prescription"; "the prescription specified only one refill"
the act of imitating the behavior of some situation or some process by means of something suitably analogous (especially for the purpose of study or personnel training)
(computer science) the technique of representing the real world by a computer program; "a simulation should imitate the internal processes and not merely the results of the thing being simulated"