What is the meaning of multiplex?

noun

• Communicates two or more signals over a common channel.
• A movie theater than has several different auditoriums in the same building.

adjective

• Many and varied; having many features or forms.
  • usage: "manifold reasons"; "our manifold failings"; "manifold intelligence"; "the multiplex opportunities in high technology"
  • synonyms: manifold
• Having many parts or aspects.
  • usage: "the multiplex problem of drug abuse"