Source : Webster's Revised Unabridged Dictionary (1913)

Fondue \Fon`due"\, n. [Also erroneously {Fon`du"}.] [F. See
   {Fondu}; cf. {Fondant}.] (Cookery)
   A dish made of cheese, eggs, butter, etc., melted together.

Source : WordNet®

fondue
     n 1: cubes of meat or seafood cooked in hot oil and then dipped
          in any of various sauces [syn: {fondu}]
     2: hot sauce-like melted cheese or chocolate in which bread or
        fruits are dipped [syn: {fondu}]