a. (sb.) Being three in one, triune. b. absol. or as sb. The triune God, the Trinity.

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1638–56.  Cowley, Davideis, I. 371. Who shall describe thy throne, Thou great Three-One?

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1719.  J. T. Philipps, trans. Thirty-four Confer., 174. This glorious Three-One God had created all Things.

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1772.  T. Olivers, Hymn, ‘The God of Abraham praise.’ Before the great Three-One They all exulting stand.

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1802.  J. Jamieson, Use Sacr. Hist., II. III. ii. 53. The love of a three-one God is displayed.

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