The Collaborative International Dictionary of English v.0.48:

Multifarious \Mul`ti*fa"ri*ous\, a. [L. multifarius; multus
   much, many. Cf. Bifarious.]
   1. Having multiplicity; having great diversity or variety; of
      various kinds; diversified; made up of many differing
      parts; manifold.
      [1913 Webster]

            There is a multifarious artifice in the structure of
            the meanest animal.                   --Dr. H. More.
      [1913 Webster]

   2. (Bot.) Having parts, as leaves, arranged in many vertical
      rows.
      [1913 Webster]

WordNet (r) 3.0 (2006):

multifarious
    adj 1: having many aspects; "a many-sided subject"; "a
           multifaceted undertaking"; "multifarious interests"; "the
           multifarious noise of a great city"; "a miscellaneous
           crowd" [syn: many-sided, multifaceted,
           miscellaneous, multifarious]

Moby Thesaurus II by Grady Ward, 1.0:

134 Moby Thesaurus words for "multifarious":
   Byzantine, allotropic, assorted, at odds, at variance, balled up,
   billion, complex, complicated, confounded, confused, conglomerate,
   considerable, contrary, contrasted, contrasting, convoluted,
   crabbed, daedal, departing, deviating, deviative, devious,
   different, differentiated, differing, disaccordant, disagreeing,
   discordant, discrepant, discrete, discriminated, disjoined,
   disparate, dissimilar, dissonant, distinct, distinguished,
   divergent, diverging, divers, diverse, diversified, diversiform,
   elaborate, embrangled, entangled, ever so many, fouled up,
   full many, heaped-up, heterogeneous, heteromorphic, heteromorphous,
   implicated, in disagreement, inaccordant, incompatible,
   incongruous, inconsistent, inconsonant, indiscriminate,
   inharmonious, intricate, involuted, involved, irreconcilable,
   jillion, knotted, labyrinthian, labyrinthine, legion, loused up,
   manifold, many, many-faceted, matted, mazy, meandering, messed up,
   metamorphic, metamorphotic, million, mixed, mixed up, motley,
   mucked up, multifold, multiform, multiphase, multiple, multiplex,
   multitudinal, multitudinous, myriad, no few, not a few, numerous,
   perplexed, poles apart, poles asunder, polymorphic, polymorphous,
   populous, promiscuous, protean, proteiform, quite some, ramified,
   roundabout, screwed up, separate, separated, several, snarled,
   subtle, sundry, tangled, tangly, thousand, twisted, unconformable,
   unequal, unlike, variant, varied, variegated, various, varying,
   very many, voluminous, widely apart, worlds apart, zillion