defectus

Perfect passive participle of dēficiō.

• (Classical Latin) IPA^(key): [deːˈfɛk.tʊs]
• (modern Italianate Ecclesiastical) IPA^(key): [deˈfɛk.tus]

dēfectus (feminine dēfecta, neuter dēfectum); first/second-declension participle

1. grown weak or faint, weakened, having suffered or suffering some weakness
2. running short of, lacking, in want, in need

First/second-declension participle.

dēfectus (feminine dēfecta, neuter dēfectum, comparative dēfectior, superlative dēfectissimus); first/second-declension adjective

1. tired, worn out
2. faulty, defective (Can we verify⁽⁺⁾ this sense?)

First/second-declension adjective.

From dēficiō +‎ -tus (forming action nouns).

• (Classical Latin) IPA^(key): [deːˈfɛk.tʊs]
• (modern Italianate Ecclesiastical) IPA^(key): [deˈfɛk.tus]

dēfectus m (genitive dēfectūs); fourth declension

1. failure
2. absence
3. weakness, failing, defect
4. defection, revolt

Fourth-declension noun.

• → Catalan: defecte (learned)
• → English: defect
• → Italian: difetto (semi-learned)
• → Old French: defaute (see there for further descendants)
• → Old Welsh: diffeith
  • Welsh: diffaith
• → Romanian: defect
• → Russian: дефе́кт (defékt)
• → Spanish: defecto

• dēfector
• dēficiō
• dēfectīvus

• “defectus”, in Charlton T. Lewis and Charles Short (1879), A Latin Dictionary, Oxford: Clarendon Press
• “defectus”, in Charlton T. Lewis (1891), An Elementary Latin Dictionary, New York: Harper & Brothers
• "defectus", 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)
• “defectus”, in Gaffiot, Félix (1934), Dictionnaire illustré latin-français, Hachette.
• defectus, in ΛΟΓΕΙΟΝ [Logeion] Dictionaries for Ancient Greek and Latin (in English, French, Spanish, German, Dutch and Chinese), University of Chicago, since 2011