What is the meaning of Simulation?

Something that simulates a system or environment in order to predict actual behaviour.

The process of simulating.

A video game designed to convey a more or less realistic experience, as of a sport or warfare.

Assuming an appearance which is feigned, or not true.

The act of falling over in order to be awarded a foul, when no foul has been committed.

simulation

Source: wiktionary.org