a suffix forming personal nouns corresponding to Latin adjectives ending in -ārius or English adjectives or nouns ending in -ary (librarian; proletarian; Rotarian; seminarian; sexagenarian; veterinarian ); subsequently productive in English with other Latinate stems, forming nouns denoting a person who supports, advocates, or practices a doctrine, theory, or set of principles associated with the base word: authoritarian; establishmentarian; totalitarian; vegetarian .
Arian1
British
/ ˈɛərɪən /
adjective
of, relating to, or characterizing Arius or Arianism
Arian Moayed, who played the investor Stewy Hosseini in “Succession” and starred in a Broadway revival of Ibsen’s “A Doll’s House” last year, theorized that the show had some theater-like attributes.