n.
1.(computer science) the technique of representing the real world by a computer program
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.representation of something (sometimes on a smaller scale)
4.the act of giving a false appearance
Idiom of the Day
come out of one's shell
to become more friendly or sociable
The little boy came out of his shell and began to talk to everybody around him.