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From mōbilis (movable, loose) +‎ -tās (-ness).


mōbilitās f (genitive mōbilitātis); third declension

  1. mobility, activity, speed, rapidity, quickness
  2. changeableness, fickleness, inconstancy


Third-declension noun.

Case Singular Plural
Nominative mōbilitās mōbilitātēs
Genitive mōbilitātis mōbilitātum
Dative mōbilitātī mōbilitātibus
Accusative mōbilitātem mōbilitātēs
Ablative mōbilitāte mōbilitātibus
Vocative mōbilitās mōbilitātēs


  • English: mobility
  • French: mobilité
  • Italian: mobilità
  • Portuguese: mobilidade
  • Spanish: movilidad


  • mobilitas”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • mobilitas”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • mobilitas 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)
  • mobilitas in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.
  • Carl Meißner, Henry William Auden (1894) Latin Phrase-Book[1], London: Macmillan and Co.
    • inconsistency; changeability: mobilitas et levitas animi