When I search the definition of Caucasian in the NOAD, I find the following definition (it's the first of three definitions):
- (often offensive) of or relating to one of the traditional divisions of humankind, covering a broad group of peoples from Europe, western Asia, and parts of India and North Africa. [ORIGIN: so named because the German physiologist Blumenbach believed that it originated in the Caucasus region of southeastern Europe.] • white-skinned; of European origin.
In a note, the dictionary says also
In the racial classification as developed by anthropologists in the 19th century, Caucasian (or Caucasoid) included peoples whose skin color ranged from light (in northern Europe) to dark (in parts of North Africa and India). Although the classification is outdated and the categories are now not generally accepted as scientific (see usage at Australoid and Mongoloid), the term Caucasian has acquired a more restricted meaning. It is now used, especially in the U.S., as a synonym for white or of European origin, as in the following citation: the police are looking for a Caucasian male in his forties.
Is Caucasian understood to have these meanings also in other English dialects?