Source : Webster's Revised Unabridged Dictionary (1913)

Parmesan \Par`me*san"\, a. [F. parmesan, It. parmigiano.]
   Of or pertaining to Parma in Italy.

   {Parmesan cheese}, a kind of cheese of a rich flavor, though
      from skimmed milk, made in Parma, Italy.

Source : WordNet®

Parmesan
     n : hard dry sharp-flavored Italian cheese; often grated