Source : Webster's Revised Unabridged Dictionary (1913)

Multipartite \Mul*tip"ar*tite\, a. [L. multipartitus multus
   much, many partitus divided, p. p.: cf. F. multipartite. See
   {Partite}.]
   Divided into many parts; having several parts.

Source : WordNet®

multipartite
     adj : involving more than two parties