The Collaborative International Dictionary of English v.0.48:

Caucasian \Cau*ca"sian\, n.
   1. A native or inhabitant of the Caucasus, esp. a Circassian
      or Georgian.
      [1913 Webster]

   2. A member of any of the white races of mankind.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Caucasian \Cau*ca"sian\, a.
   1. Of or pertaining to the Caucasus, a mountainous region
      between the Black and Caspian seas.
      [1913 Webster]

   2. Of or pertaining to the white races of mankind, of whom
      the people about Mount Caucasus were formerly taken as the
      type.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Caucasian
    adj 1: of or relating to the geographical region of Caucasia;
           "Caucasian languages" [syn: Caucasian, Caucasic]
    2: of or relating to Caucasian people [syn: Caucasian,
       Caucasoid]
    n 1: a member of the Caucasoid race [syn: White, White
         person, Caucasian]
    2: a number of languages spoken in the Caucasus that are
       unrelated to languages spoken elsewhere [syn: Caucasian,
       Caucasian language]

Moby Thesaurus II by Grady Ward, 1.0:

41 Moby Thesaurus words for "Caucasian":
   American Indian, Amerind, Australian aborigine, Bushman, Indian,
   Malayan, Mister Charley, Mongolian, Negrillo, Negrito, Negro,
   Oriental, Red Indian, WASP, black, black man, blackfellow, boy,
   brown man, burrhead, colored person, coon, darky, gook, honky,
   jigaboo, jungle bunny, nigger, niggra, ofay, paleface, pygmy,
   red man, redskin, slant-eye, spade, the Man, white, white man,
   whitey, yellow man