quaternity

Noun

quaternity (countable and uncountable, plural quaternities)

1. A group or set of four; a foursome, a quartet.
   • [T]heir VVhole Scale, of all that is above the Body, vvas indeed not a Trinity, but a Quaternity, or Four Ranks and Degrees of Beings, one belovv another; the Firſt of Henades or Unities, the Second of Noes, Minds or Intellects, the Third of Souls, and the Laſt of Natures: theſe being as it vvere...1678, R[alph] Cudworth, chapter IV, in The True Intellectual System of the Universe: The First Part; wherein All the Reason and Philosophy of Atheism is Confuted; and Its Impossibility Demonstrated...
   • It should perhaps be noted that, throughout the development of his psychological system, [Carl] Jung demonstrated a remarkable passion for the detection of opposites and their resolution through the constellation of quaternities. Not only are there four psychic functions of thinking, feeling...2014, Paul Bishop, “A Voyage of Discovery to the Other Pole of the World”, in Carl Jung, London: Reaktion Books, →ISBN, page 194

   Synonyms:

   foursome, quadruplet, quadruplicity, quadrad, quaternion, quartet, tetrad, tetraplet

   1. (historical) A group of four persons forming the Godhead, in contrast to the Trinity comprising three persons.
      • [H]e is bounden to beleue in yͤ trinitie. And yͤ felowe beleueth in a quaternitie. That is ꝙ [quod, i.e., quoth] I yͤ hole trinite ⁊ one moe.1528, Thomas More, “A Dialogue Concernynge Heresyes & Matters of Religion […]. Chapter XIX.”, in Wyllyam Rastell [i.e., William Rastell], editor, The Workes of Sir Thomas More Knyght, […], London...
2. (obsolete, rare) Synonym of quarter (“a fourth part”).
   • The firſt vvith divers crooks and turnings vvries, / Cutting the tovvn in foure quaternities; / But both joyn to reſiſt invading enemies.1633, P[hineas] F[letcher], “Cant[o] V”, in The Purple Island, or The Isle of Man: […], [Cambridge, Cambridgeshire]: […] [T]he printers to the Universities of Cambridge, →OCLC, stanza 12, page 49

   Synonyms:

   quarter

3. (uncountable) Synonym of fourness (“the property or state of being four in number”).
   • Some that in mystical quaternity / All Deity existed; and the first / Y'cleped Ineffable, and the last, Truth; / Father and Son, gods intermediate.1848, Philip James Bailey, “Scene—A Visit”, in Festus: A Poem, 3rd edition, London: William Pickering, →OCLC, page 208

   Synonyms:

   fourness