The Collaborative International Dictionary of English v.0.48:

Kentucky \Ken*tuck"y\, prop. n.
   One of the United States.
   [1913 Webster]

   Kentucky blue grass (Bot.), a valuable pasture and meadow
      grass (Poa pratensis), found in both Europe and America.
      See under Blue grass.

   Kentucky coffee tree (Bot.), a tall North American tree
      (Gymnocladus Canadensis) with bipinnate leaves. It
      produces large woody pods containing a few seeds which
      have been used as a substitute for coffee. The timber is
      very valuable.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Kentucky
    n 1: a state in east central United States; a border state
         during the American Civil War; famous for breeding race
         horses [syn: Kentucky, Bluegrass State, KY]