noun

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

   “The most reliable simulation predicts that the hurricane will turn north.”

2. The process of simulating.

   “Despite extensive simulation in the design phase, the aircraft failed to behave as expected.”

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

   “Some kids in the classroom will be playing simulations after school.”