The Collaborative International Dictionary of English v.0.48:

Canap'e \Ca`na`p['e]"\, n. [F., orig. a couch with mosquito
   curtains. See Canopy.]
   1. A sofa or divan.
      [Webster 1913 Suppl.]

   2. (Cookery) an appetizer consisting of a thin slice or piece
      of bread toasted or fried in butter or oil, on which
      anchovies, mushrooms, caviar, cheese, or other savory
      foods, are served.
      [Webster 1913 Suppl. + WordNet 1.5]

WordNet (r) 3.0 (2006):

canape
    n 1: an appetizer consisting usually of a thin slice of bread or
         toast spread with caviar or cheese or other savory food

Moby Thesaurus II by Grady Ward, 1.0:

28 Moby Thesaurus words for "canape":
   BLT, Dagwood sandwich, Sloppy Joe, Swiss cheese sandwich, antepast,
   antipasto, aperitif, appetizer, bacon-lettuce-tomato sandwich,
   cheeseburger, corned beef sandwich, double-decker sandwich,
   egg salad sandwich, foretaste, grilled cheese sandwich, grinder,
   ham sandwich, hamburger, hoagy, hot dog, pastrami sandwich,
   poor boy, sandwich, smorgasbord, submarine sandwich,
   tuna salad sandwich, tunaburger, whet