serial port



  • noun a connector and circuit used to convert the data in a computer to and from a form in which each bit is transmitted one at a time over a single wire. Usually, data in a computer is transferred around the computer in parallel form that is eight or 16 bits wide. If you want to use a modem, you need to send the modem serial data that it can convert into sound signals that can be sent one at a time over a telephone line.