/ mʌltɪpleksɪŋ /
A technique used in communications and input/output operations for transmitting a number of separate signals simultaneously over a single channel or line. To maintain the integrity of each signal on the channel, multiplexing can separate the signals by time, space, or frequency. The device used to combine the signals is a multiplexer. See also FDM, space-division multiplexing, time-division multiplexing.