[f. THREE + -NESS; cf. OE. þrynes, þriʓnes: see THRINNESS.] The fact, quality, or condition of being three or threefold; spec. said of the Godhead.
[a. 900. trans. Bæda’s Hist., IV. xix. [xvii.] (1890), 312. We ondettað … Þriʓnisse in Annisse efenspedelice, ond Annesse in þære Þriʓnesse.]
1829. Jas. Mill, Hum. Mind (1869), II. 92. Abstract terms merely; in place of which, the words oneness, twoness, threeness, might be substituted.
1855. Lynch, Lett. to Scattered, v. (1872), 65. That in the Oneness there is Threeness, that the One God is Triune.
1899. Month, Jan., 14. Threeness in person with oneness in nature.
