Source : Webster's Revised Unabridged Dictionary (1913)

Kentucky \Ken*tuck"y\, n.
   One of the United States.

   {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.

Blue grass \Blue" grass`\ (Bot.)
   A species of grass ({Poa compressa}) with bluish green stems,
   valuable in thin gravelly soils; wire grass.

   {Kentucky blue grass}, a species of grass ({Poa pratensis})
      which has running rootstocks and spreads rapidly. It is
      valuable as a pasture grass, as it endures both winter and
      drought better than other kinds, and is very nutritious.

Grama grass, grazing. West and Pacific slope. {Bouteloua
oligostachya}, etc. Great bunch grass, pasture and hay. Far
West. {Festuca scabrella}. Guinea grass, hay. South. {Panicum
jumentorum}. Herd's grass, in New England Timothy, in
Pennsylvania and South Redtop. Indian grass. Same as {Wood
grass} (below). Italian rye grass, forage and hay. {Lolium
Italicum}. Johnson grass, grazing aud hay. South and Southwest.
{Sorghum Halepense}. Kentucky blue grass, pasture. {Poa
pratensis}. Lyme grass, coarse hay. South. {Elymus}, several
species. Manna grass, pasture and hay. {Glyceria}, several
species. Meadow fescue, pasture and hay. {Festuca elatior}.
Meadow foxtail, pasture, hay, lawn. North. {Alopecurus
pratensis}. Meadow grass, pasture, hay, lawn. {Poa}, several
species. Mesquite, or Muskit grass. Same as {Grama grass}
(above).

Source : WordNet®

Poa pratensis
     n : valuable meadow and pasture grass in Europe and especially
         central United States having tall stalks and slender
         bright green leaves; a chief constituent in lawn grass
         mixtures [syn: {Kentucky bluegrass}, {Kentucky blue}, {Kentucy
         blue grass}, {June grass}]