See also: Actio




From āctum +‎ -tiō, using the supine of agō(do, make).



āctiō f ‎(genitive āctiōnis); third declension

  1. action; a doing or performing, behavior
  2. public function, civil act
  3. (law) suit, process, action
  4. gesticulation made while speaking
  5. (drama) the action, plot, series of events


Third declension.

Case Singular Plural
nominative āctiō āctiōnēs
genitive āctiōnis āctiōnum
dative āctiōnī āctiōnibus
accusative āctiōnem āctiōnēs
ablative āctiōne āctiōnibus
vocative āctiō āctiōnēs

Related termsEdit



  • actio in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • actio in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • ACTIO in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
  • Félix Gaffiot (1934), Dictionnaire Illustré Latin-Français, Paris: Hachette, s.v.actio”.
  • Meissner, Carl; Auden, Henry William (1894) Latin Phrase-Book[1], London: Macmillan and Co.
    • practical philosophy: philosophia, quae in actione versatur
    • the treatment of the piece: actio
    • delivery: actio (Brut. 38)
    • the delivery is rather halting, poor: actio paulum claudicat
    • a private, civil prosecution: actio, petitio
  • actio in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
  • actio in William Smith et al., editor (1890) A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin