Source : Webster's Revised Unabridged Dictionary (1913)

Patty \Pat"ty\, n.; pl. {Patties}. [F. p[^a]t['e]. See {Pasty}.]
   A little pie.

Source : WordNet®

patty
     n 1: small flat mass of chopped food [syn: {cake}]
     2: small pie or pasty
     3: round flat candy