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Latin ordinal numbers
 <  3rd 4th 5th  > 
    Cardinal : quattuor
    Ordinal : quārtus
    Adverbial : quater
    Multiplier : quadruplex
    Distributive : quaternī


From Proto-Indo-European *kʷeturto-, from *kʷetwóres (four). Cognate to quādrus (square), from sense “four-sided”.



quārtus m (feminine quārta, neuter quārtum); first/second declension

  1. (ordinal) fourth, the ordinal number after tertius and before quintus


First/second declension.

Number Singular Plural
Case / Gender Masculine Feminine Neuter Masculine Feminine Neuter
nominative quārtus quārta quārtum quārtī quārtae quārta
genitive quārtī quārtae quārtī quārtōrum quārtārum quārtōrum
dative quārtō quārtō quārtīs
accusative quārtum quārtam quārtum quārtōs quārtās quārta
ablative quārtō quārtā quārtō quārtīs
vocative quārte quārta quārtum quārtī quārtae quārta

Derived terms[edit]



  • quartus in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • quartus in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • du Cange, Charles (1883), “quartus”, in G. A. Louis Henschel, Pierre Carpentier, Léopold Favre, editors, Glossarium Mediæ et Infimæ Latinitatis (in Latin), Niort: L. Favre
  • quartus in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français [Illustrated Latin-French Dictionary], Hachette