The Collaborative International Dictionary of English v.0.48:

Calumet \Cal"u*met\, n. [F. calumet, fr. L. calamus reed. See
   Halm, and cf. Shawm.]
   A kind of pipe, used by the North American Indians for
   smoking tobacco. The bowl is usually made of soft red stone,
   and the tube is a long reed often ornamented with feathers.
   [1913 Webster]

         Smoked the calumet, the Peace pipe,
         As a signal to the nations.              --Lowgfellow.
   [1913 Webster]

   Note: The calumet is used as a symbol of peace. To accept the
         calumet is to agree to terms of peace, and to refuse it
         is to reject them. The calumet of peace is used to seal
         or ratify contracts and alliances, and as an evidence
         to strangers that they are welcome.
         [1913 Webster]

WordNet (r) 3.0 (2006):

calumet
    n 1: a highly decorated ceremonial pipe of Amerindians; smoked
         on ceremonial occasions (especially as a token of peace)
         [syn: calumet, peace pipe, pipe of peace]

U.S. Gazetteer Counties (2000):

Calumet -- U.S. County in Wisconsin
   Population (2000):    40631
   Housing Units (2000): 15758
   Land area (2000):     319.839197 sq. miles (828.379681 sq. km)
   Water area (2000):    77.187643 sq. miles (199.915070 sq. km)
   Total area (2000):    397.026840 sq. miles (1028.294751 sq. km)
   Located within:       Wisconsin (WI), FIPS 55
   Location:             44.111956 N, 88.211825 W
   Headwords:
    Calumet
    Calumet, WI
    Calumet County
    Calumet County, WI


U.S. Gazetteer Places (2000):

Calumet, OK -- U.S. town in Oklahoma
   Population (2000):    535
   Housing Units (2000): 205
   Land area (2000):     1.280604 sq. miles (3.316748 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.280604 sq. miles (3.316748 sq. km)
   FIPS code:            11050
   Located within:       Oklahoma (OK), FIPS 40
   Location:             35.600454 N, 98.120409 W
   ZIP Codes (1990):     73014
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Calumet, OK
    Calumet


U.S. Gazetteer Places (2000):

Calumet-Norvelt, PA -- U.S. Census Designated Place in Pennsylvania
   Population (2000):    1682
   Housing Units (2000): 709
   Land area (2000):     1.454463 sq. miles (3.767042 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.454463 sq. miles (3.767042 sq. km)
   FIPS code:            10836
   Located within:       Pennsylvania (PA), FIPS 42
   Location:             40.213730 N, 79.493121 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Calumet-Norvelt, PA
    Calumet-Norvelt
    Calumet, PA
    Calumet


U.S. Gazetteer Places (2000):

Calumet, IA -- U.S. city in Iowa
   Population (2000):    181
   Housing Units (2000): 83
   Land area (2000):     0.264410 sq. miles (0.684820 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.264410 sq. miles (0.684820 sq. km)
   FIPS code:            10090
   Located within:       Iowa (IA), FIPS 19
   Location:             42.945988 N, 95.552078 W
   ZIP Codes (1990):     51009
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Calumet, IA
    Calumet


U.S. Gazetteer Places (2000):

Calumet, MI -- U.S. village in Michigan
   Population (2000):    879
   Housing Units (2000): 491
   Land area (2000):     0.194290 sq. miles (0.503210 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.194290 sq. miles (0.503210 sq. km)
   FIPS code:            12580
   Located within:       Michigan (MI), FIPS 26
   Location:             47.247360 N, 88.454557 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Calumet, MI
    Calumet


U.S. Gazetteer Places (2000):

Calumet, MN -- U.S. city in Minnesota
   Population (2000):    383
   Housing Units (2000): 178
   Land area (2000):     1.591110 sq. miles (4.120956 sq. km)
   Water area (2000):    0.010805 sq. miles (0.027984 sq. km)
   Total area (2000):    1.601915 sq. miles (4.148940 sq. km)
   FIPS code:            09316
   Located within:       Minnesota (MN), FIPS 27
   Location:             47.321205 N, 93.274324 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Calumet, MN
    Calumet