simulation
n. C / Un. a model or computer program that copies how something works in real life. You use it to practice or test things without any real danger.
n. the technique of representing the real world by a computer program or model to study its behaviour. Often involves the imitation of a situation or process.
The pilot practices landing in a flight simulation.
Scientists used a computer simulation to predict how the virus might spread through a crowded city.
Advanced climate simulations allow researchers to model atmospheric changes over centuries, providing a statistical basis for policy decisions regarding carbon emissions and environmental protection.
First attested in 1340 as Middle English symulacioun, from Middle French simulation, from Old French simulation/simulacion, from Latin simulātiōnem, from simulō (“imitate”). Morphologically simulate + -ion.
Uncountable when referring to the general technique; countable when referring to a specific instance or software run.