Etymology 1Edit

From Proto-Indo-European *mḗh₁n̥s (moon, month), probably from Proto-Indo-European *meh₁- (to measure), referring to the moon's phases as the measure of time. Cognate with Ancient Greek μήν (mḗn), μήνη (mḗnē), English month, Scots moneth (month), North Frisian muunt (month), Saterland Frisian Mound (month), Dutch maand (month), German Low German Maand, Monat (month), German Monat (month), Danish måned (month), Swedish månad (month), Icelandic mánuði (month), Armenian ամիս (amis), Old Irish , Old Church Slavonic мѣсѧць (měsęcĭ).



mēnsis m (genitive mēnsis); third declension

  1. month

Third-declension noun (i-stem).

Case Singular Plural
Nominative mēnsis mēnsēs
Genitive mēnsis mēnsium
Dative mēnsī mēnsibus
Accusative mēnsem mēnsēs
Ablative mēnse mēnsibus
Vocative mēnsis mēnsēs
Derived termsEdit
Related termsEdit
  • Aromanian: mes
  • Asturian: mes
  • Catalan: mes
  • Dalmatian: mais
  • Old French: mois, meis
    • French: mois
    • Norman: mais (Jersey), meis (Guernsey, continental Normandy)
  • Friulian: mês

Etymology 2Edit

Inflected form of mēnsa (table).




  1. dative plural of mēnsa
  2. ablative plural of mēnsa


  • mensis in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • mensis in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • mensis in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
  • mensis in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français, Hachette
  • Carl Meissner; Henry William Auden (1894) Latin Phrase-Book[1], London: Macmillan and Co.
    • to hold out for four months: obsidionem quattuor menses sustinere
    • (ambiguous) the intercalary year (month, day): annus (mensis, dies) intercalaris
  • mensis in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
  • mensis in William Smith et al., editor (1890) A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin