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Alternative forms[edit]


From perficiō +‎ -tiō.


perfectiō f (genitive perfectiōnis); third declension

  1. finishing, completion
  2. perfection


Third-declension noun.

Case Singular Plural
Nominative perfectiō perfectiōnēs
Genitive perfectiōnis perfectiōnum
Dative perfectiōnī perfectiōnibus
Accusative perfectiōnem perfectiōnēs
Ablative perfectiōne perfectiōnibus
Vocative perfectiō perfectiōnēs



  • perfectio”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • perfectio”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • perfectio in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
  • perfectio in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette
  • Carl Meißner; Henry William Auden (1894) Latin Phrase-Book[1], London: Macmillan and Co.
    • to attain perfection: ad perfectionem, (ad summum) pervenire
    • ideal perfection: absolutio et perfectio (not summa perfectio)
    • to conceive an ideal: singularem quandam perfectionis imaginem animo concipere