Borrowed from Latin coniugātiō (combining, connecting; conjugation), from coniugō (join, unite together). Equivalent to conjugate +‎ -ion.



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conjugation (countable and uncountable, plural conjugations)

  1. The coming together of things; union.
  2. (biology) The temporary fusion of organisms, especially as part of sexual reproduction
  3. Sexual relations within marriage
  4. (grammar) In some languages, one of several classifications of verbs according to what inflections they take.
    • 1530 July 18, Iohan Palſgrave, “The Introduction”, in Leſclarciſſement de la langue francoyſe [] [1], London: Richard Pynſon, Iohan Haukyns, →OCLC, page 32; reprinted as Lesclarcissement de la langue françoyse, Genève: Slatkine Reprints, 1972:
      In ſo moche that if any verbe be of the thyꝛde coniugation / I ſet out all his rotes and tenſes []
  5. (grammar) The act or process of conjugating a verb.
  6. (grammar) The product of that act: the conjugated forms of a verb, collected into a list or recitation.
    Meronym: principal parts
  7. (chemistry) A system of delocalized orbitals consisting of alternating single bonds and double bonds
  8. (mathematics) A mapping sending x to gxg-1, where g and x are elements of a group; inner automorphism
  9. (mathematics) A function which negates the non-real part of a complex or hypercomplex number; complex conjugation


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