The Collaborative International Dictionary of English v.0.48:

Copenhagen \Copenhagen\ prop. n. (Geography)
   The capital city of Denmark. Population (2000) = 1,339,395.
   [PJC]

The Collaborative International Dictionary of English v.0.48:

Copenhagen \Co`pen*ha"gen\, n. [From Copenhagen, Denmark.]
   1. A sweetened hot drink of spirit and beaten eggs.
      [Webster 1913 Suppl.]

   2. A children's game in which one player is inclosed by a
      circle of others holding a rope.
      [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

Copenhagen
    n 1: the capital and largest city of Denmark; located on the
         island of Zealand; "Copenhagen is sometimes called the
         Paris of the North" [syn: Copenhagen, Kobenhavn,
         Danish capital]

U.S. Gazetteer Places (2000):

Copenhagen, NY -- U.S. village in New York
   Population (2000):    865
   Housing Units (2000): 383
   Land area (2000):     1.201458 sq. miles (3.111763 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.201458 sq. miles (3.111763 sq. km)
   FIPS code:            18135
   Located within:       New York (NY), FIPS 36
   Location:             43.893078 N, 75.672474 W
   ZIP Codes (1990):     13626
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Copenhagen, NY
    Copenhagen