Source : WordNet®

parallel port
     n : an interface between a computer and a printer where the
         computer sends multiple bits of information to the
         printer simultaneously [syn: {parallel interface}]

Source : Free On-Line Dictionary of Computing

parallel port
     
         An interface from a computer system where data is
        transferred in or out in parallel, that is, on more than one
        wire.  A parallel port carries one {bit} on each wire thus
        multiplying the transfer rate obtainable over a single wire.
        There will usually be some control signals on the port as well
        to say when data is ready to be sent or received.
     
        The commonest kind of parallel port is a {printer port}, e.g. a
        {Centronics} port which transfers eight bits at a time.  Disks
        are also connected via special parallel ports, e.g. {SCSI} or
        {IDE}.
     
        (1995-01-24)