a. Of or pertaining to Unitarians, or their doctrines. [ 1913 Webster ]

n. [ Cf. F. unitaire, unitairien, NL. unitarius. See Unity. ] 1. (Theol.) One who denies the doctrine of the Trinity, believing that God exists only in one person; a unipersonalist; also, one of a denomination of Christians holding this belief. [ 1913 Webster ]

2. One who rejects the principle of dualism. [ 1913 Webster ]

3. A monotheist. [ R. ] Fleming. [ 1913 Webster ]

n. [ Cf. F. unitairianisme. ] The doctrines of Unitarians. [ 1913 Webster ]

v. t. & i. [ imp. & p. p. Unitarianized p. pr. & vb. n. Unitarianizing ] To change or turn to Unitarian views. [ 1913 Webster ]

a. 1. Of or pertaining to a unit or units; relating to unity; as, the unitary method in arithmetic. [ 1913 Webster ]

2. Of the nature of a unit; not divided; united. [ 1913 Webster ]

Unitary theory (Chem.), the modern theory that the molecules of all complete compounds are units, whose parts are bound together in definite structure, with mutual and reciprocal influence on each other, and are not mere aggregations of more or less complex groups; -- distinguished from the dualistic theory. [ 1913 Webster ]