region of NW Germany, in the state of Schleswig-Holstein: formerly a duchy of Denmark
See Holstein in American Heritage Dictionary 4
(hōlˈstīnˌ, -stēnˌ)
A region and former duchy of northern Germany at the base of the Jutland Peninsula. It became a duchy under the suzerainty of the Holy Roman Empire in 1474 and was often controlled by Denmark in the years that followed.
(hōlˈstīnˌ, -stēnˌ)
noun
Any of a breed of large black and white dairy cattle originally developed in Friesland.