Source : Webster's Revised Unabridged Dictionary (1913)

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

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

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

   2. A member of any of the white races of mankind.

Source : WordNet®

Caucasian
     adj 1: of or relating to the geographical region of Caucasia;
            "Caucasian languages" [syn: {Caucasic}]
     2: of or belonging to a racial group having light skin
        coloration; "voting patterns within the white population"
        [syn: {white}] [ant: {black}]

Caucasian
     n 1: a member of the Caucasoid race [syn: {White}, {white person}]
     2: a number of languages spoken in the Caucasus that have no
        known affiliations to languages spoken elsewhere [syn: {Caucasian
        language}]