Nouns

(n)multiplexcommunicates two or more signals over a common channel
(n)multiplexa movie theater that has several different auditoriums in the same building

Adjectives

(s)manifold, multiplexmany and varied; having many features or forms“manifold reasons”, “our manifold failings”, “manifold intelligence”, “the multiplex opportunities in high technology”
(s)multiplexhaving many parts or aspects“the multiplex problem of drug abuse”