defectio

From dēficiō + -tiō.

• (Classical Latin) IPA^(key): [deːˈfɛk.ti.oː]
• (modern Italianate Ecclesiastical) IPA^(key): [deˈfɛk.t͡si.o]

dēfectiō f (genitive dēfectiōnis); third declension

1. defection, desertion

   Synonym: dēsertiō

2. rebellion, revolt (of a city)
   • 27 BCE – 25 BCE, Titus Livius, Ab Urbe Condita 26.1:

     Ea tum cura maxime intentos habebat Romanos, non ab ira tantum, quae in nullam unquam ciuitatem iustior fuit, quam quod urbs tam nobilis ac potens, sicut defectione sua traxerat aliquot populos, ita recepta inclinatura rursus animos uidebatur ad ueteris imperii respectum.

     This concern in particular troubled the mindful Romans at the time, not so much because of anger, which has never been more justified against any other city, rather because a city so noble and powerful, in the same way that it had attracted the support of a number of communities by its revolt, was thought would again turn attention back towards respect for the previous government once recaptured.

3. failing, failure, deficiency, want, disappearance, decline

   Synonyms: cāritās, dēsīderium, egestās, dēficientia, necessitās, pēnūria, inopia, angustia, indigentia, ūsus

4. eclipse
   • 106 BCE – 43 BCE, Cicero, Cato Maior de Senectute 14.49:

     Quam dēlectābat eum dēfectiōnēs sōlis et lūnae multō ante nōbīs praedīcere!

     How much it delighted him to predict for us the eclipses of the sun and the moon long before [they occurred]!
     (See: Gaius Sulpicius Gallus.)

5. ellipsis
6. a fainting spell, failure of energy or stamina

Third-declension noun.

• Catalan: defecció
• → English: defection
• French: défection
• Italian: defezione
• → Portuguese: defeção
• Romanian: defecțiune
• Spanish: defección

• “defectio”, in Charlton T. Lewis and Charles Short (1879), A Latin Dictionary, Oxford: Clarendon Press
• “defectio”, in Charlton T. Lewis (1891), An Elementary Latin Dictionary, New York: Harper & Brothers
• "defectio", in Charles du Fresne du Cange, Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• “defectio”, in Gaffiot, Félix (1934), Dictionnaire illustré latin-français, Hachette.
• Carl Meißner; Henry William Auden (1894), Latin Phrase-Book‎^[1], London: Macmillan and Co.
  • an eclipse of the sun: solis defectio