The Collaborative International Dictionary of English v.0.48:

Vinification \Vin`i*fi*ca"tion\, n. [L. vinum wine + E.
   -fication.]
   The conversion of a fruit juice or other saccharine solution
   into alcohol by fermentation.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

vinification
    n 1: the process whereby fermentation changes grape juice into
         wine