What does arian mean?
The definition of arian
Ar”ian, a. & n. (Ethnol.)
See Aryan.
A”ri*an, a.
Etym: [L. Arianus.]

Pertaining to Arius, a presbyter of the church of Alexandria, in the fourth century, or to the doctrines of Arius, who held Christ to be inferior to God the Father in nature and dignity, though the first and noblest of all created beings.

— n.

One who adheres to or believes the doctrines of Arius. Mosheim.