Etymology 1Edit

From Proto-Italic *mēnsis, extended from *mēns, from Proto-Indo-European *mḗh₁n̥s (moon, month), probably from *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), Lithuanian mėnesis (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 mánuður (month), Armenian ամիս (amis), Old Irish , Old Church Slavonic мѣсѧць (měsęcĭ).


mēnsis m (genitive mēnsis); third declension

  1. a 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

Despite being an I-stem, this noun has the consonantal accusative singular termination -em and the consonantal ablative singular termination -e.

Derived termsEdit
Related termsEdit

Etymology 2Edit

See the etymology of the corresponding lemma form.


mēnsīs f

  1. dative/ablative plural of mēnsa

Etymology 3Edit

See the etymology of the corresponding lemma form.



  1. dative/ablative masculine/feminine/neuter plural of mēnsus


  • 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 with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 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