<p><strong>Adjective</strong></p><ul><li>having many parts or aspects: the multiplex problem of drug abuse.</li><li>manifold; multiple: the multiplex opportunities in high technology.</li><li>Telecommunications: of, relating to, or using equipment permitting the simultaneous transmission of two or more signals or messages over a single channel.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) Telecommunications: to arrange (a circuit) for use by multiplex telegraphy, allowing multiple synchronous signals to be sent and received on a single telegraph wire.</li><li>to transmit (two or more signals or messages) by a multiplex system, circuit, or the like, as in telegraph and telephone communication, or television and radio broadcasting.</li><li>(used without object) to send several messages or signals simultaneously, as in telegraph and telephone communication, or television and radio broadcasting.</li></ul><p><strong>Noun</strong></p><ul><li>a multiplex electronics system.</li><li>(in map making) a stereoscopic device that makes it possible to view pairs of aerial photographs in three dimensions.</li><li>Also called multi·plex cin·e·ma, a group of two or more movie theaters on the same site or in the same building, especially a cluster of adjoining theaters.</li></ul>