To make something that is not real look, feel, or behave like it is real, usually for a specific purpose like training or testing.
Simulated things are not real, but they are made to seem real for a reason.
Examples:
They simulated a flight to the moon.
The doctor simulated the operation before doing it for real.
The students simulated a space mission in class.
I simulated being a robot for the school play.
In the game, you can simulate being a dragon.
She simulated driving a car by using a video game.