The Collaborative International Dictionary of English v.0.48:

Mackenzie \Mackenzie\ peop. n.
   a Canadian river; flows into the Beaufort Sea.

   Syn: Mackenzie River.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Mackenzie
    n 1: Canadian explorer (born in England) who explored the
         Mackenzie River and who was first to cross North America by
         land north of Mexico (1764-1820) [syn: Mackenzie, Sir
         Alexander Mackenzie]
    2: a Canadian river; flows into the Beaufort Sea [syn:
       Mackenzie, Mackenzie River]

U.S. Gazetteer Places (2000):

Mackenzie, MO -- U.S. village in Missouri
   Population (2000):    137
   Housing Units (2000): 66
   Land area (2000):     0.025769 sq. miles (0.066742 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.025769 sq. miles (0.066742 sq. km)
   FIPS code:            45110
   Located within:       Missouri (MO), FIPS 29
   Location:             38.580352 N, 90.316590 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Mackenzie, MO
    Mackenzie