A Simulation

1. Something that simulates a system or environment in order to predict actual behaviour.
2. The process of simulating.
3. Despite extensive simulation in the design phase, the aircraft failed to behave as expected.
4. (video games) A video game designed to convey a more or less realistic experience, as of a sport or warfare.
5. Assuming an appearance which is feigned, or not true.
6. (soccer) The act of falling over in order to be awarded a foul, when no foul has been committed.