General English


  • noun a device which links a computer to a telephone line, allowing data to be sent from one computer to another


  • noun a device that allows data to be sent over telephone lines by converting binary signals from a computer into analog sound signals which can be transmitted over a telephone line.


  • Short for modulator/demodulator. An electronic device that transmits data to or from a computer via telephone lines. A modem translates between digital signals (used by data processing equipment) and analog signals (used in voice switching equipment). Once the data is sent through the telephone lines, it is retranslated back into digital form in the computer at the receiving end.


  • A device which enables a computer to transmit and receive information over telephone lines. For transmission, a computer modulates a carrier signal so that it contains digital information in a form that can be transmitted over analog lines. It does the opposite for reception. Most modems feature data compression and error correction. Also called telephone modem.
  • Any signal conversion device which combines the functions of a demodulator and modulator.
  • synonymmodulator-demodulator

Information & Library Science

  • noun an electronic device which converts binary to analogue signals so that data can be transmitted over the telephone network

Media Studies

  • noun a device linking a computer to a telephone line so that the Internet can be accessed

General Science

  • abbreviation formodulator/demodulator