Caucasian is originally a geographical term, meaning relative or pertaining to the Caucasus region of eastern Europe. It has in time acquired other specific meanings:

• in linguistics, the Caucasian languages are a large number of languages spoken in the Caucasus area; often specifically those that have no demonstrated relatives outside of that region, which are classified into the South, Northwest, Northeast, and North_central Caucasian language families.

• in physical anthropology, the Caucasian race is meant for a specific race of Homo sapiens, sometimes given a Latin designation such as "Varietas Caucasia" (sic), which does not follow the International Code of Zoological Nomenclature.

• in forensic anthropology and census contexts, especially in the United States, the Caucasian type is a specific combination of physical attributes, especially white skin.

• in common usage and political contexts in the USA and Australia, Caucasian refers to light_complexioned people indigenous to, or descended from Europe, northern Africa, southwest Asia, and the Indian subcontinent. In North America, Caucasian usually means a white person of northern, southern, eastern, and western European descent, excluding people with significant Asian, African, or USA, Canada,Australia.

• in bartending, a Caucasian is a mixed drink also referred to as a White Russian.