Previous definitions:
1.
A hard, dry, aged cheese with a granular texture, made from partially skimmed cow's milk. The original Italian version is called Parmigiano-Reggiano, produced in the areas of Parma, Bologna, Mantua, or Modena. It's often aged 2 years or more, and has a hard, pale-yellow rind and a beige colored interior, with a rich and sharp flavor. Parmesans are most often used for grating.
As defined by Mechanical Turk
on November 14, 2011