Of or belonging to the air or atmosphere; = "aerial" in various senses.
Early 17th century. From French aérien from classical Latin āerius + French -en.
An adherent of the doctrines of Aerius, whose beliefs included the rejection of the validity of the episcopate and presbyterate.
Mid 16th century. From post-classical Latin Aerianus (usually in plural Aeriani) adherent of the doctrines of Aerius from the name of Aerius, 4th-cent. presbyter of Pontus + classical Latin -ānus.