The only way she’s Caucasian is if you’re using it to mean “white”, which is based in pseudoscientific racial theory. Quoting the second definition from Wiktionary:
(anthropology, dated) Of a racial classification pertaining to people having certain phenotypical features such as straight, curly, or wavy hair and very light to brown pigmented skin, and originating from Europe, parts of Northern Africa and Central, South, and Western Asia.
Synonyms: Caucasoid, Europid
I don’t tend to do linguistic prescriptivism, but I have to make an exception for things like this. Caucasian should just be used to refer to people from the Caucasus.
The only way she’s Caucasian is if you’re using it to mean “white”, which is based in pseudoscientific racial theory. Quoting the second definition from Wiktionary:
I don’t tend to do linguistic prescriptivism, but I have to make an exception for things like this. Caucasian should just be used to refer to people from the Caucasus.