[1] : The Collaborative International Dictionary of English v.0.48

walnut \wal"nut\, n. oe. walnot, as. wealh-hnutu a welsh or
   foreign nut, a walnut; wealh foreign, strange, n., a
   welshman, celt akin to ohg. walh, properly, a celt, from the
   name of a celtic tribe, in l. volcae + hnutu a nut; akin to
   d. walnoot, g. walnuss, icel. valhnot, sw. valn"ot, dan
   valn"od. see nut, and cf. welsh. bot.
   the fruit or nut of any tree of the genus juglans; also,
   the tree, and its timber. the seven or eight known species
   are all natives of the north temperate zone.
   1913 webster
   1913 webster

   note: in some parts of america, especially in new england,
         the name walnut is given to several species of hickory
         carya, and their fruit.
         1913 webster

   ash-leaved walnut, a tree juglans fraxinifolia, native
      in transcaucasia.

   black walnut, a north american tree juglans nigra
      valuable for its purplish brown wood, which is extensively
      used in cabinetwork and for gunstocks. the nuts are
      thick-shelled, and nearly globular.

   english walnut, or european walnut, a tree juglans
      regia, native of asia from the caucasus to japan,
      valuable for its timber and for its excellent nuts, which
      are also called madeira nuts.

   walnut brown, a deep warm brown color, like that of the
      heartwood of the black walnut.

   walnut oil, oil extracted from walnut meats. it is used in
      cooking, making soap, etc.

   white walnut, a north american tree juglans cinerea,
      bearing long, oval, thick-shelled, oily nuts, commonly
      called butternuts. see butternut.
      1913 webster
see also:
nut welsh juglans carya ash-leaved walnut juglans fraxinifolia 
black walnut juglans nigra english walnut european walnut juglans regia 
madeira nuts walnut brown walnut oil white walnut juglans cinerea 
butternuts butternut 

[2] : WordNet (r) 2.0

walnut
     n 1: nut of any of various walnut trees having a wrinkled
          two-lobed seed with a hard shell
     2: hard dark-brown wood of any of various walnut trees; used
        especially for furniture and paneling
     3: any of various trees of the genus juglans syn: walnut tree
see also:
walnut tree 

[3] : U.S. Gazetteer (1990)

walnut, ca city, fips 83332
  location: 34.02902 n, 117.85738 w
  population 1990: 29105 8091 housing units
  area: 23.0 sq km land, 0.0 sq km water
walnut, ia city, fips 82065
  location: 41.47911 n, 95.22267 w
  population 1990: 857 344 housing units
  area: 2.1 sq km land, 0.0 sq km water
  zip codes: 51577
walnut, il village, fips 78526
  location: 41.55682 n, 89.59105 w
  population 1990: 1463 594 housing units
  area: 1.8 sq km land, 0.0 sq km water
walnut, ks city, fips 74950
  location: 37.60031 n, 95.07449 w
  population 1990: 214 119 housing units
  area: 2.6 sq km land, 0.0 sq km water
  zip codes: 66780
walnut, ms town, fips 77480
  location: 34.94853 n, 88.90010 w
  population 1990: 523 234 housing units
  area: 3.4 sq km land, 0.0 sq km water
  zip codes: 38683
walnut, nc
  zip codes: 28753

[4] : U.S. Gazetteer Places (2000)

walnut, ca -- u.s. city in california
   population 2000:    30004
   housing units 2000: 8395
   land area 2000:     8.982015 sq. miles 23.263311 sq. km
   water area 2000:    0.000000 sq. miles 0.000000 sq. km
   total area 2000:    8.982015 sq. miles 23.263311 sq. km
   fips code:            83332
   located within:       california ca, fips 06
   location:             34.027738 n, 117.860514 w
   zip codes 1990:    
   note: some zip codes may be omitted esp. for suburbs.
   headwords:
    walnut, ca
    walnut

[5] : U.S. Gazetteer Places (2000)

walnut, il -- u.s. village in illinois
   population 2000:    1461
   housing units 2000: 607
   land area 2000:     0.832855 sq. miles 2.157084 sq. km
   water area 2000:    0.000000 sq. miles 0.000000 sq. km
   total area 2000:    0.832855 sq. miles 2.157084 sq. km
   fips code:            78526
   located within:       illinois il, fips 17
   location:             41.556404 n, 89.591503 w
   zip codes 1990:    
   note: some zip codes may be omitted esp. for suburbs.
   headwords:
    walnut, il
    walnut

[6] : U.S. Gazetteer Places (2000)

walnut, ia -- u.s. city in iowa
   population 2000:    778
   housing units 2000: 350
   land area 2000:     2.144188 sq. miles 5.553422 sq. km
   water area 2000:    0.000000 sq. miles 0.000000 sq. km
   total area 2000:    2.144188 sq. miles 5.553422 sq. km
   fips code:            82065
   located within:       iowa ia, fips 19
   location:             41.480999 n, 95.221116 w
   zip codes 1990:     51577
   note: some zip codes may be omitted esp. for suburbs.
   headwords:
    walnut, ia
    walnut

[7] : U.S. Gazetteer Places (2000)

walnut, ks -- u.s. city in kansas
   population 2000:    221
   housing units 2000: 116
   land area 2000:     0.990805 sq. miles 2.566174 sq. km
   water area 2000:    0.000000 sq. miles 0.000000 sq. km
   total area 2000:    0.990805 sq. miles 2.566174 sq. km
   fips code:            74950
   located within:       kansas ks, fips 20
   location:             37.600359 n, 95.075867 w
   zip codes 1990:     66780
   note: some zip codes may be omitted esp. for suburbs.
   headwords:
    walnut, ks
    walnut

[8] : U.S. Gazetteer Places (2000)

walnut, ms -- u.s. town in mississippi
   population 2000:    754
   housing units 2000: 341
   land area 2000:     5.420013 sq. miles 14.037768 sq. km
   water area 2000:    0.024984 sq. miles 0.064708 sq. km
   total area 2000:    5.444997 sq. miles 14.102476 sq. km
   fips code:            77480
   located within:       mississippi ms, fips 28
   location:             34.949109 n, 88.909812 w
   zip codes 1990:     38683
   note: some zip codes may be omitted esp. for suburbs.
   headwords:
    walnut, ms
    walnut

Walnut >> W Words
Walnut, definition of term: Walnut
walnut_pag1.html

Walnut Tree >> W Words
Walnut Tree, definition of term: Walnut Tree
walnut+tree_pag1.html

Walnut Creek >> W Words
Walnut Creek, definition of term: Walnut Creek
walnut+creek_pag1.html

Black Walnut >> B Words
Black Walnut, definition of term: Black Walnut
black+walnut_pag1.html