- Relating to, having, or consisting of multiple elements or parts: "the whole complex and multiplex detail of the noble science of dinner” ( Thomas Love Peacock).
- Relating to or being a system of simultaneous communication of two or more messages on the same wire or radio channel.
- A building, especially a movie theater or dwelling, with multiple separate units.
- To send messages or signals simultaneously using a multiplex system.
- To send simultaneously using a multiplex system.