The Collaborative International Dictionary of English v.0.48:

Osages \O*sa"ges\, n. pl.; sing. Osage. (Ethnol.)
   A tribe of southern Sioux Indians, now living in the Indian
   Territory.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Osage \Osage\ prop. n.
   A tributary of the Missouri River.

   Syn: Osage River.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

Osage \Osage\ prop. n.
   1. A member of the Osages, a tribe of North American Indians
      formerly living in western Missouri.
      [PJC]

   2. The language of the Osages, a siouxan language.
      [PJC]

WordNet (r) 3.0 (2006):

Osage
    n 1: a member of the Siouan people formerly living in Missouri
         in the valleys of the Missouri and Osage rivers; oil was
         found on Osage lands early in the 20th century
    2: a river in Missouri that is a tributary of the Missouri River
       [syn: Osage, Osage River]
    3: the Dhegiha dialect spoken by the Osage

U.S. Gazetteer Counties (2000):

Osage -- U.S. County in Kansas
   Population (2000):    16712
   Housing Units (2000): 7018
   Land area (2000):     703.503830 sq. miles (1822.066478 sq. km)
   Water area (2000):    15.721583 sq. miles (40.718711 sq. km)
   Total area (2000):    719.225413 sq. miles (1862.785189 sq. km)
   Located within:       Kansas (KS), FIPS 20
   Location:             38.639801 N, 95.727351 W
   Headwords:
    Osage
    Osage, KS
    Osage County
    Osage County, KS


U.S. Gazetteer Counties (2000):

Osage -- U.S. County in Missouri
   Population (2000):    13062
   Housing Units (2000): 5904
   Land area (2000):     606.107077 sq. miles (1569.810055 sq. km)
   Water area (2000):    7.299428 sq. miles (18.905430 sq. km)
   Total area (2000):    613.406505 sq. miles (1588.715485 sq. km)
   Located within:       Missouri (MO), FIPS 29
   Location:             38.464962 N, 91.859336 W
   Headwords:
    Osage
    Osage, MO
    Osage County
    Osage County, MO


U.S. Gazetteer Counties (2000):

Osage -- U.S. County in Oklahoma
   Population (2000):    44437
   Housing Units (2000): 18826
   Land area (2000):     2250.799428 sq. miles (5829.543510 sq. km)
   Water area (2000):    52.995991 sq. miles (137.258981 sq. km)
   Total area (2000):    2303.795419 sq. miles (5966.802491 sq. km)
   Located within:       Oklahoma (OK), FIPS 40
   Location:             36.571147 N, 96.350965 W
   Headwords:
    Osage
    Osage, OK
    Osage County
    Osage County, OK


U.S. Gazetteer Places (2000):

Osage, WY -- U.S. Census Designated Place in Wyoming
   Population (2000):    215
   Housing Units (2000): 124
   Land area (2000):     1.936867 sq. miles (5.016463 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.936867 sq. miles (5.016463 sq. km)
   FIPS code:            58680
   Located within:       Wyoming (WY), FIPS 56
   Location:             43.982948 N, 104.424145 W
   ZIP Codes (1990):     82723
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Osage, WY
    Osage


U.S. Gazetteer Places (2000):

Osage, OK -- U.S. town in Oklahoma
   Population (2000):    188
   Housing Units (2000): 108
   Land area (2000):     0.321115 sq. miles (0.831684 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.321115 sq. miles (0.831684 sq. km)
   FIPS code:            56150
   Located within:       Oklahoma (OK), FIPS 40
   Location:             36.293820 N, 96.417777 W
   ZIP Codes (1990):     74054
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Osage, OK
    Osage


U.S. Gazetteer Places (2000):

Osage, IA -- U.S. city in Iowa
   Population (2000):    3451
   Housing Units (2000): 1624
   Land area (2000):     2.090442 sq. miles (5.414220 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    2.090442 sq. miles (5.414220 sq. km)
   FIPS code:            59745
   Located within:       Iowa (IA), FIPS 19
   Location:             43.284618 N, 92.812129 W
   ZIP Codes (1990):     50461
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Osage, IA
    Osage