The Collaborative International Dictionary of English v.0.48:

Waterman \Wa"ter*man\, n.; pl. Watermen.
   [1913 Webster]
   1. A man who plies for hire on rivers, lakes, or canals, or
      in harbors, in distinction from a seaman who is engaged on
      the high seas; a man who manages fresh-water craft; a
      boatman; a ferryman.
      [1913 Webster]

   2. An attendant on cab stands, etc., who supplies water to
      the horses. [Eng.] --Dickens.
      [1913 Webster]

   3. A water demon. --Tylor.
      [1913 Webster]

WordNet (r) 3.0 (2006):

waterman
    n 1: someone who drives or rides in a boat [syn: boatman,
         boater, waterman]

U.S. Gazetteer Places (2000):

Waterman, IL -- U.S. village in Illinois
   Population (2000):    1224
   Housing Units (2000): 471
   Land area (2000):     1.002084 sq. miles (2.595386 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.002084 sq. miles (2.595386 sq. km)
   FIPS code:            79163
   Located within:       Illinois (IL), FIPS 17
   Location:             41.770971 N, 88.774697 W
   ZIP Codes (1990):     60556
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Waterman, IL
    Waterman