n. [ See Arian. ] (Eccl. Hist.) A member of a branch of the Arians which did not acknowledge the Son to be consubstantial with the Father, that is, of the same substance, but admitted him to be of a like substance with the Father, not by nature, but by a peculiar privilege. [ 1913 Webster ]
a. Of or pertaining to Semi-Arianism. [ 1913 Webster ]
n. The doctrines or tenets of the Semi-Arians. [ 1913 Webster ]