The Collaborative International Dictionary of English v.0.48:

Bailey \Bai"ley\, n. [The same word as bail line of palisades;
   cf. LL. ballium bailey, OF. bail, baille, a palisade,
   baillier to inclose, shut.]
   1. The outer wall of a feudal castle. [Obs.]
      [1913 Webster]

   2. The space immediately within the outer wall of a castle or
      fortress. [Obs.]
      [1913 Webster]

   3. A prison or court of justice; -- used in certain proper
      names; as, the Old Bailey in London; the New Bailey in
      Manchester. [Eng.] --Oxf. Gloss.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Bailey
    n 1: United States singer (1918-1990) [syn: Bailey, Pearl
         Bailey, Pearl Mae Bailey]
    2: English lexicographer who was the first to treat etymology
       consistently; his work was used as a reference by Samuel
       Johnson (died in 1742) [syn: Bailey, Nathan Bailey,
       Nathaniel Bailey]
    3: the outer courtyard of a castle
    4: the outer defensive wall that surrounds the outer courtyard
       of a castle

U.S. Gazetteer Counties (2000):

Bailey -- U.S. County in Texas
   Population (2000):    6594
   Housing Units (2000): 2738
   Land area (2000):     826.691450 sq. miles (2141.120935 sq. km)
   Water area (2000):    0.684798 sq. miles (1.773619 sq. km)
   Total area (2000):    827.376248 sq. miles (2142.894554 sq. km)
   Located within:       Texas (TX), FIPS 48
   Location:             34.110864 N, 102.816791 W
   Headwords:
    Bailey
    Bailey, TX
    Bailey County
    Bailey County, TX


U.S. Gazetteer Places (2000):

Bailey, NC -- U.S. town in North Carolina
   Population (2000):    670
   Housing Units (2000): 302
   Land area (2000):     0.701002 sq. miles (1.815586 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.701002 sq. miles (1.815586 sq. km)
   FIPS code:            03020
   Located within:       North Carolina (NC), FIPS 37
   Location:             35.780279 N, 78.115622 W
   ZIP Codes (1990):     27807
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Bailey, NC
    Bailey


U.S. Gazetteer Places (2000):

Bailey, TX -- U.S. city in Texas
   Population (2000):    213
   Housing Units (2000): 98
   Land area (2000):     0.400228 sq. miles (1.036585 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.400228 sq. miles (1.036585 sq. km)
   FIPS code:            05264
   Located within:       Texas (TX), FIPS 48
   Location:             33.434279 N, 96.165364 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Bailey, TX
    Bailey