simulation

noun

1. 1

   the act of giving a false appearance

   his conformity was only pretending

2. 2

   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)

3. 3

   representation of something (sometimes on a smaller scale)

4. 4

   (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