Westernism
/ˈwɛst(ə)nɪz(ə)m/ /ˈwɛstənɪz(ə)m/noun
1An idiom or expression peculiar to the western United States.
2Behaviour, attitudes, etc., considered characteristic of western culture; especially. European and North American practices as distinguished from those of Asia.
Origin
Mid 19th century. From western + -ism. Compare Easternism.