The Collaborative International Dictionary of English v.0.48:

Chocolate \Choc"o*late\, n. [Sp., fr. the Mexican name of the
   cacao. Cf. Cacao, Cocoa.]
   1. A paste or cake composed of the roasted seeds of the
      Theobroma Cacao ground and mixed with other ingredients,
      usually sugar, and cinnamon or vanilla.
      [1913 Webster]

   2. The beverage made by dissolving a portion of the paste or
      cake in boiling water or milk.
      [1913 Webster]

   Chocolate house, a house in which customers may be served
      with chocolate.

   Chocolate nut. See Cacao.
      [1913 Webster]

WordNet (r) 3.0 (2006):

chocolate
    n 1: a beverage made from cocoa powder and milk and sugar;
         usually drunk hot [syn: cocoa, chocolate, hot
         chocolate, drinking chocolate]
    2: a food made from roasted ground cacao beans
    3: a medium brown to dark-brown color [syn: chocolate,
       coffee, deep brown, umber, burnt umber]

Moby Thesaurus II by Grady Ward, 1.0:

88 Moby Thesaurus words for "chocolate":
   Life Saver, Scotch kisses, beige, bonbon, brittle, brown, brownish,
   brownish-yellow, brunet, bubble gum, butterscotch, candied apple,
   candy corn, caramel, chewing gum, chocolate bar, chocolate drop,
   cinnamon, cocoa, cocoa-brown, coffee, coffee-brown, cotton candy,
   cough drop, cream, divinity, drab, dun, dun-brown, dun-drab, ecru,
   fawn, fawn-colored, fondant, fudge, fuscous, glace, grege, gum,
   gumdrop, hard candy, hazel, honey crisp, horehound, jelly bean,
   jelly egg, jujube, khaki, kiss, lollipop, lozenge, lurid,
   marchpane, marshmallow, marzipan, mint, nougat, nut-brown,
   olive-brown, olive-drab, peanut bar, peanut brittle, peppermint,
   popcorn balls, praline, rock candy, saltwater taffy, seal,
   seal-brown, sepia, snuff-colored, sorrel, sugar candy, sugarplum,
   taffy, tan, taupe, tawny, toast, toast-brown, toffee, torrone,
   tutti-frutti, umber, umber-colored, walnut, walnut-brown,
   yellowish-brown