white vs caucasian?

[keannu]

If you say some is a Caucasian, does it usually mean a white person with European background or any white person from any part of the world? I always thought Caucasians are mainly from Europe.
I mean many Americans can be Caucasians but such people have European ancestors' blood background.

 

[bhaisahab]

If you say some is a Caucasian, does it usually mean a white person with European background or any white person from any part of the world? I always thought Caucasians are mainly from Europe.
I mean many Americans can be Caucasians but such people have European ancestors' blood background.

This is the generally accepted definition in modern English. Caucasian adjective - definition in British English Dictionary & Thesaurus - Cambridge Dictionary Online