Being three in one. Used especially of the Christian Trinity.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "triune" in a sentence
"Middle Ages been known as the triune kingdom of Croatia, Slavonia, and"
"He described Saturn as "triune" in form, mistaking the rings for a planet straddled by two close moons."
"The Trinity, as commonly accepted, Mrs. Eddy denies, though she seems to admit a kind of triune nature in God by saying over and over again that he is "Love, Truth, and Life.""