The Collaborative International Dictionary of English v.0.48:

Welsh \Welsh\, v. t. & i.
      (a) To cheat by avoiding payment of bets; -- said esp. of
          an absconding bookmaker at a race track. [Slang]
      (b) To avoid dishonorably the fulfillment of a pecuniary
          obligation. [Slang]
          [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Welsh \Welsh\, n.
   [1913 Webster]
   1. The language of Wales, or of the Welsh people.
      [1913 Webster]

   2. pl. The natives or inhabitants of Wales.
      [1913 Webster]

   Note: The Welsh call themselves Cymry, in the plural, and a
         Welshman Cymro, and their country Cymru, of which the
         adjective is Cymreig, and the name of their language
         Cymraeg. They are a branch of the Celtic family, and a
         relic of the earliest known population of England,
         driven into the mountains of Wales by the Anglo-Saxon
         invaders.
         [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Welsh \Welsh\, a. [AS. w[ae]lisc, welisc, from wealh a stranger,
   foreigner, not of Saxon origin, a Welshman, a Celt, Gael;
   akin to OHG. walh, whence G. w[aum]lsch or welsch, Celtic,
   Welsh, Italian, French, Foreign, strange, OHG. walhisc; from
   the name of a Celtic tribe. See Walnut.]
   Of or pertaining to Wales, or its inhabitants. [Sometimes
   written also Welch.]
   [1913 Webster]

   Welsh flannel, a fine kind of flannel made from the fleece
      of the flocks of the Welsh mountains, and largely
      manufactured by hand.

   Welsh glaive, or Welsh hook, a weapon of war used in
      former times by the Welsh, commonly regarded as a kind of
      poleax. --Fairholt. --Craig.

   Welsh mortgage (O. Eng. Law), a species of mortgage, being
      a conveyance of an estate, redeemable at any time on
      payment of the principal, with an understanding that the
      profits in the mean time shall be received by the
      mortgagee without account, in satisfaction of interest.
      --Burrill.

   Welsh mutton, a choice and delicate kind of mutton obtained
      from a breed of small sheep in Wales.

   Welsh onion (Bot.), a kind of onion (Allium fistulosum)
      having hollow inflated stalks and leaves, but scarcely any
      bulb, a native of Siberia. It is said to have been
      introduced from Germany, and is supposed to have derived
      its name from the German term w[aum]lsch foreign.

   Welsh parsley, hemp, or halters made from hemp. [Obs. &
      Jocular] --J. Fletcher.

   Welsh rabbit. See under Rabbit.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Welsh
    adj 1: of or relating to or characteristic of Wales or its
           people or their language; "the Welsh coast"; "Welsh
           syntax" [syn: Welsh, Cambrian]
    n 1: a native or resident of Wales [syn: Welshman, Welsh,
         Cambrian, Cymry]
    2: a Celtic language of Wales [syn: Welsh, Cymric]
    3: a breed of dual-purpose cattle developed in Wales [syn:
       Welsh, Welsh Black]
    v 1: cheat by avoiding payment of a gambling debt [syn: welsh,
         welch]

Moby Thesaurus II by Grady Ward, 1.0:

32 Moby Thesaurus words for "welsh":
   back out, backpedal, backwater, crawfish out, cry off, default,
   disallow, dishonor, dodge, dog it, duck, duck duty, get out of,
   goldbrick, goof off, levant, malinger, not pay, not pull fair,
   protest, refuse to pay, renege, repudiate, resile, shirk, skulk,
   slack, slide out of, slip out of, sneak out of, soldier,
   stop payment



U.S. Gazetteer Places (2000):

Welsh, LA -- U.S. town in Louisiana
   Population (2000):    3380
   Housing Units (2000): 1370
   Land area (2000):     6.217523 sq. miles (16.103310 sq. km)
   Water area (2000):    0.120424 sq. miles (0.311898 sq. km)
   Total area (2000):    6.337947 sq. miles (16.415208 sq. km)
   FIPS code:            80430
   Located within:       Louisiana (LA), FIPS 22
   Location:             30.237419 N, 92.820593 W
   ZIP Codes (1990):     70591
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Welsh, LA
    Welsh