Computer (noun)

1. A machine that performs calculations or computations.
2. An electronic device that stores, retrieves, and processes data.
3. A device that can be programmed to carry out a set of instructions.
4. A device that can be used to perform a wide range of tasks, such as playing games, creating documents, and browsing the internet.
5. A device that can be connected to other devices to share and exchange data.

Origin:

The word computer comes from the latin word "computare" which means to calculate or reckon. this word was used to refer to a person or machine that performs calculations or computations.

Examples:

1. He used the computer to write a report.
2. She bought a new computer.
3. They used the computer to play a game.
4. The computer was connected to the internet.
5. The computer was used to control the robot.