Emulator (noun)

1. A software program or device that imitates the behavior of another system or device.
2. A computer program that enables a computer system to imitate the functions of another computer system or platform.

Origin:

From the latin word "emulare", which means "to imitate".

Examples:

1. The emulator allowed users to run old video games on their modern computer systems.
2. The emulator was used by developers to test their applications on different platforms.
3. The emulator was a valuable tool for preserving old computer software and games.
4. The emulator was highly customizable, allowing users to adjust settings and tweak performance.
5. The emulator was widely used by gamers and was considered one of the best in the industry.