What does "kentucky" mean?

Kentucky: 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 a very valuable.