The Collaborative International Dictionary of English v.0.48:

Tomahawk \Tom"a*hawk\, n. [Of American Indian origin; cf.
   Algonkin tomehagen, Mohegan tumnahegan, Delaware tamoihecan.]
   A kind of war hatchet used by the American Indians. It was
   originally made of stone, but afterwards of iron.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Tomahawk \Tom"a*hawk\, v. t. [imp. & p. p. Tomahawked; p. pr.
   & vb. n. Tomahawking.]
   To cut, strike, or kill, with a tomahawk.
   [1913 Webster]

WordNet (r) 3.0 (2006):

tomahawk
    n 1: weapon consisting of a fighting ax; used by North American
         Indians [syn: tomahawk, hatchet]
    v 1: cut with a tomahawk
    2: kill with a tomahawk

U.S. Gazetteer Places (2000):

Tomahawk, WI -- U.S. city in Wisconsin
   Population (2000):    3770
   Housing Units (2000): 1696
   Land area (2000):     7.438294 sq. miles (19.265092 sq. km)
   Water area (2000):    1.399116 sq. miles (3.623694 sq. km)
   Total area (2000):    8.837410 sq. miles (22.888786 sq. km)
   FIPS code:            80125
   Located within:       Wisconsin (WI), FIPS 55
   Location:             45.474463 N, 89.731454 W
   ZIP Codes (1990):     54487
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Tomahawk, WI
    Tomahawk