(as letters) abbr. A technique for sharing a communications channel across multiple transmitters by granting access to the channel to one device at a time. Short for Time Division Multiple Access. In this way, the full bandwidth is made available to each device for short periods of time. The decision about which transmitter can use the channel at a given time can be made in advance, in which case each transmitter has a dedicated time slot every so often, or dynamically.Compare to FDMA.