The Collaborative International Dictionary of English v.0.48:

Dane \Dane\, n. [LL. Dani: cf. AS. Dene.]
   A native, or a naturalized inhabitant, of Denmark.
   [1913 Webster]

   Great Dane. (Zool.) See Danish dog, under Danish.
      Danegeld

The Collaborative International Dictionary of English v.0.48:

Danish \Dan"ish\, a. [See Dane.]
   Belonging to the Danes, or to their language or country. --
   n. The language of the Danes.
   [1913 Webster]

   Danish dog (Zool.), one of a large and powerful breed of
      dogs reared in Denmark; -- called also great Dane. See
      Illustration in Appendix.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Great Dane
    n 1: very large powerful smooth-coated breed of dog