triunePronunciation: /ˈtrʌɪjuːn/Definition of triune adjective consisting of three in one (used especially with reference to the Trinity):the triune GodheadDerivatives triunityPronunciation: /-ˈjuːnɪti/ noun (plural triunities)Origin: early 17th century: from tri- 'three' + Latin unus 'one'triune in other Oxford dictionaries Definition of triune in the US English dictionary