[ noun ] 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)
Used in print(Clement Greenberg, "Collage" in his Art and...)
In certain other pictures , however , Braque began to paint areas in exact simulation of wood graining or marbleizing .
[ noun ] (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"