From Websters: (Italics mine)
sim⋅u⋅la⋅tion /ˌsɪm

yəˈleɪ

ʃən/ [sim-y
uh-
ley-sh
uh
n]
–noun
1.imitation or enactment, as of something anticipated or in testing.
2.the act or process of pretending; feigning.
3.an assumption or imitation of a particular appearance or form; counterfeit; sham.
brutal!
4.
Psychiatry. a conscious attempt to feign some mental or physical disorder to escape punishment or to gain a desired objective.
I like this one, hehe, as in when I faked a fever to get out of going to school
5.the representation of the behavior or characteristics of one system through the use of another system, esp. a computer program designed for the purpose.
most relevant, I suppose.