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Perfect passive participle of cognōscō (know, recognise).


cognitus m (feminine cognita, neuter cognitum); first/second declension

  1. known (from experience), recognised, having been recognised
  2. noted, acknowledged, having been acknowledged


First/second declension.

Number Singular Plural
Case / Gender Masculine Feminine Neuter Masculine Feminine Neuter
nominative cognitus cognita cognitum cognitī cognitae cognita
genitive cognitī cognitae cognitī cognitōrum cognitārum cognitōrum
dative cognitō cognitō cognitīs
accusative cognitum cognitam cognitum cognitōs cognitās cognita
ablative cognitō cognitā cognitō cognitīs
vocative cognite cognita cognitum cognitī cognitae cognita



cognitus m (genitive cognitūs); fourth declension

  1. acquaintance (act of getting to know one)


Fourth declension.

Case Singular Plural
nominative cognitus cognitūs
genitive cognitūs cognituum
dative cognituī cognitibus
accusative cognitum cognitūs
ablative cognitū cognitibus
vocative cognitus cognitūs


  • cognitus in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • cognitus in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • du Cange, Charles (1883), “cognitus”, in G. A. Louis Henschel, Pierre Carpentier, Léopold Favre, editors, Glossarium Mediæ et Infimæ Latinitatis (in Latin), Niort: L. Favre
  • cognitus in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français [Illustrated Latin-French Dictionary], Hachette
  • Carl Meissner; Henry William Auden (1894) Latin Phrase-Book[1], London: Macmillan and Co.
    • to have a theoretical knowledge of a thing: ratione, doctrina (opp. usu) aliquid cognitum habere
    • we know from experience: usu cognitum habemus
    • to be well-informed, erudite: multa cognita, percepta habere, multa didicisse
    • without going to law: indicta causa (opp. cognita causa)