1.Definition: (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"

Category: General

2.Definition: representation of something (sometimes on a smaller scale)

Related Noun(s):model

Category: Objects

3.Definition: the act of giving a false appearance

Related Noun(s):pretence, pretense

Category: General

4.Definition: 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)

Category: General