To combine multiple signals (analog or digital) for transmission over a single line or media.
One way to multiplex control files is to store a control file copy on every disk drive that stores members of redo log groups, if the redo log is multiplexed. By storing control files in these locations, you minimize the risk that all control files and all groups of the redo log will be lost in a single disk failure.  In analog radio transmission, signals are commonly multiplexed using frequency-division multiplexing (FDM), in which the bandwidth on a communications link is divided into subchannels of different frequency widths, each carrying a signal at the same time in parallel. Multiplexing (or muxing) is a way of sending multiple signals or streams of information over a communications link at the same time in the form of a single, complex signal; the receiver recovers the separate signals, a process called demultiplexing (or demuxing). Making Networks Virtual: The Latest on SDN Technologies. 1 Multiplexing may refer to the design of a multiplexed display (non-multiplexed displays are immune to the Dorito effect). 2  Multiplexing may refer to the design of a switch matrix (non-multiplexed buttons are immune to phantom keys and also immune to phantom key blocking). Time-division multiplexing (TDM) is a digital (or in rare cases, analog) technology which uses time, instead of space or frequency, to separate the different data streams. In telecommunications and computer networks, multiplexing (sometimes contracted to muxing) is a method by which multiple analog message signals or digital data streams are combined into one signal over a shared medium. Time-division multiplexing (TDM) is a digital (or in rare cases, analog) technology which uses time, instead of space or frequency, to separate the different data streams. Demultiplexing is to separate 2 or more channels that have been multiplexed. Signals are typically multiplexed or combined onto one higher speed channel to efficiently use the bandwidth. Demultiplexing is the process of separating the multiplexed signal into its individual component signals.     NOTE: The major distinction between multiplexing and multiple access is that in multiple access the signals are coming from many different sources and are going to many different destinations. Zabbix. vs. SecurActive Performance Vision. Multiplexing (or muxing) is a way of sending multiple signals or streams of information over a communications link at the same time in the form of a single, complex signal; the receiver recovers the separate signals, a process called demultiplexing (or demuxing). Making Networks Virtual: The Latest on SDN Technologies. Multiplexed displays are electronic display devices where the entire display is not driven at one time. A keyboard matrix circuit has a very similar arrangement as a multiplexed display, and has many of the same advantages. In order to reduce the number of wires even further, some people share wires between a multiplexed display and a keyboard matrix, reducing the number of wires even further. In communications, the multiplexed signal is transmitted over a communication channel, which may be a physical transmission medium. The multiplexing divides the capacity of the low-level communication channel into several higher-level logical channels, one for each message signal or data stream to be transferred. The data and address buses are multiplexed in order to save pin count on the chip. In the first clock cycle of a read or write cycle, the address is emitted on the address/dat … a bus. The ALE signal is used to strobe the address, after which the address/data bus becomes the data bus. Main » TERM » M ». To combine multiple signals (analog or digital) for transmission over a single line or media. A common type of multiplexing combines several low-speed signals for transmission over a single high-speed connection. The following are several examples of different multiplexing methods: 
http://docs.oracle.com/cd/B19306_01/server.102/b14231/control.htm http://searchnetworking.techtarget.com/definition/multiplexing https://en.wikipedia.org/wiki/Multiplexing https://en.wikipedia.org/wiki/Multiplexing http://www.answers.com/Q/What_is_demultiplexing http://searchnetworking.techtarget.com/definition/multiplexing https://en.wikipedia.org/wiki/Multiplexed_display http://www.answers.com/Q/What_is_meant_by_multiplexed_address_data_bus http://www.webopedia.com/TERM/M/multiplexing.html
what is multiplexed