definition of
simulation

[1] #1 simulation n. 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). wn

[2] #2 simulation n. [computer simulation] (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". wn

[3] #3 simulation n. [model] representation of something (sometimes on a smaller scale). wn

[4] #4 simulation n. [pretense, pretence, pretending, feigning] the act of giving a false appearance; "his conformity was only pretending". wn