Also known as: hd.
HD stands for various terms. Discover the full forms, meanings, and possible interpretations of HD across different fields and industries.
Data transmission over a circuit capable of transmitting in either direction, but not simultaneously. Of or pertaining to two-way communi-cation that takes place in only one direction at a time. For example, transmission between half-duplex modems occurs when one modem waits to transmit until the other has finished sending.
ComputingIT TerminologyLast updated: