The Collaborative International Dictionary of English v.0.48:

Fivefold \Five"fold`\ (f[imac]v"-f[=o]ld`), a. & adv.
   In fives; consisting of five in one; five repeated;
   quintuple.
   [1913 Webster]

WordNet (r) 3.0 (2006):

fivefold
    adj 1: having five units or components [syn: quintuple,
           fivefold, five-fold]