The Collaborative International Dictionary of English v.0.48:

Cornish \Cor"nish\ (k?r"n?sh), a.
   Of or pertaining to Cornwall, in England.
   [1913 Webster]

   Cornish chough. See Chough.

   Cornish engine, a single-acting pumping engine, used in
      mines, in Cornwall and elsewhere, and for water works. A
      heavy pump rod or plunger, raised by the steam, forces up
      the water by its weight, in descending.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cornish \Cor"nish\, n.
   The dialect, or the people, of Cornwall.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Cornish
    adj 1: of or related to Cornwall or its people or the Cornish
           language
    n 1: a Celtic language spoken in Cornwall
    2: English breed of compact domestic fowl; raised primarily to
       crossbreed to produce roasters [syn: Cornish, Cornish
       fowl]

U.S. Gazetteer Places (2000):

Cornish, OK -- U.S. town in Oklahoma
   Population (2000):    172
   Housing Units (2000): 75
   Land area (2000):     0.588992 sq. miles (1.525481 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.588992 sq. miles (1.525481 sq. km)
   FIPS code:            17350
   Located within:       Oklahoma (OK), FIPS 40
   Location:             34.162641 N, 97.595472 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Cornish, OK
    Cornish


U.S. Gazetteer Places (2000):

Cornish, UT -- U.S. town in Utah
   Population (2000):    259
   Housing Units (2000): 76
   Land area (2000):     4.844497 sq. miles (12.547190 sq. km)
   Water area (2000):    0.010031 sq. miles (0.025979 sq. km)
   Total area (2000):    4.854528 sq. miles (12.573169 sq. km)
   FIPS code:            15940
   Located within:       Utah (UT), FIPS 49
   Location:             41.965668 N, 111.952636 W
   ZIP Codes (1990):     84308
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Cornish, UT
    Cornish