Modem (noun)

1. An electronic device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information.
2. A device that connects a computer to the internet or other network via a telephone or cable line.

Origin:

Acronym for modulator-demodulator.

Examples:

1. I need to buy a new modem because mine is not working.
2. The modem was connected to the telephone line and to the computer.
3. The modem is responsible for converting the digital signals from the computer into analog signals that can be transmitted over the phone lines.
4. The modem is the bridge between the computer and the internet.
5. The modem allows the computer to connect to the internet and access the web.