The Collaborative International Dictionary of English v.0.48:

Jay \Jay\, n. [F. geai, OF. gai, jaj, perh. fr. OHG. g[=a]hi.
   Cf. Gay.] (Zool.)
   Any one of the numerous species of birds belonging to
   Garrulus, Cyanocitta, and allied genera of the family
   Corvidae. They are allied to the crows, but are smaller,
   more graceful in form, often handsomely colored, and usually
   have a crest.
   [1913 Webster]

   Note: The European jay (Garrulus glandarius) is a large and
         handsomely colored species, having the body pale
         reddish brown, lighter beneath; tail and wing quills
         blackish; the primary coverts barred with bright blue
         and black; throat, tail coverts, and a large spot on
         the wings, white. Called also jay pie, Jenny jay,
         and k[ae]. The common blue jay (Cyanocitta
         cristata.), and the related species, are brilliantly
         colored, and have a large erectile crest. The
         California jay (Aphelocoma Californica), the Florida
         jay (Aphelocoma Floridana), and the green jay
         (Xanthoura luxuosa), of Texas and Mexico, are large,
         handsome, crested species. The Canada jay (Perisoreus
         Canadensis), and several allied species, are much
         plainer and have no crest. See Blue jay, and Whisky
         jack.
         [1913 Webster]

   Jay thrush (Zool.), any one several species of Asiatic
      singing birds, of the genera Garrulax, Grammatoptila,
      and related genera of the family Crateropodid[ae]; as,
      the white-throated jay thrush (Garrulax albogularis)
      (also called the white-throated laughingthrush), of
      India.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Jay
    n 1: United States diplomat and jurist who negotiated peace
         treaties with Britain and served as the first chief justice
         of the United States Supreme Court (1745-1829) [syn: Jay,
         John Jay]
    2: crested largely blue bird

U.S. Gazetteer Counties (2000):

Jay -- U.S. County in Indiana
   Population (2000):    21806
   Housing Units (2000): 9074
   Land area (2000):     383.636740 sq. miles (993.614553 sq. km)
   Water area (2000):    0.179609 sq. miles (0.465184 sq. km)
   Total area (2000):    383.816349 sq. miles (994.079737 sq. km)
   Located within:       Indiana (IN), FIPS 18
   Location:             40.425659 N, 85.030582 W
   Headwords:
    Jay
    Jay, IN
    Jay County
    Jay County, IN


U.S. Gazetteer Places (2000):

Jay, FL -- U.S. town in Florida
   Population (2000):    579
   Housing Units (2000): 278
   Land area (2000):     1.582924 sq. miles (4.099754 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.582924 sq. miles (4.099754 sq. km)
   FIPS code:            35425
   Located within:       Florida (FL), FIPS 12
   Location:             30.951183 N, 87.152043 W
   ZIP Codes (1990):     32565
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Jay, FL
    Jay


U.S. Gazetteer Places (2000):

Jay, OK -- U.S. city in Oklahoma
   Population (2000):    2482
   Housing Units (2000): 1051
   Land area (2000):     3.234983 sq. miles (8.378567 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    3.234983 sq. miles (8.378567 sq. km)
   FIPS code:            37650
   Located within:       Oklahoma (OK), FIPS 40
   Location:             36.423906 N, 94.797831 W
   ZIP Codes (1990):     74346
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Jay, OK
    Jay