See also: Nox and NOx



nox (plural nox)

  1. (rare) millilux (unit of illuminance)




From Proto-Indo-European *nókʷts. Cognates include Ancient Greek νύξ (núx), Sanskrit नक्ति (nákti), Old English niht (English night) and Proto-Slavic *noťь.



nox f (genitive noctis); third declension

  1. night (period of time)
    Nox pars obscura diei est.
    Night is the dim part of the day.
  2. darkness
  3. a dream
  4. (figuratively) confusion
  5. (figuratively) ignorance
  6. (figuratively) death


Third-declension noun (i-stem).

Case Singular Plural
Nominative nox noctēs
Genitive noctis noctium
Dative noctī noctibus
Accusative noctem noctīs
Ablative nocte noctibus
Vocative nox noctēs




Derived termsEdit


  • Eastern Romance:
    • Balkan-Romance:
      • Aromanian: noapti
      • Istro-Romanian: nopte
      • Romanian: noapte
    • Dalmatian: nuat
    • Istriot: nuoto, noto
  • Southern Romance:
  • Western Romance:


  • nox in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • nox in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • nox in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
  • nox in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français, Hachette
  • Carl Meissner; Henry William Auden (1894) Latin Phrase-Book[1], London: Macmillan and Co.
    • a star-light night: nox sideribus illustris
    • till late at night: ad multam noctem
    • in the silence of the night: silentio noctis
    • night and day: noctes diesque, noctes et dies, et dies et noctes, dies noctesque, diem noctemque
    • to prolong a conversation far into the night: sermonem producere in multam noctem (Rep. 6. 10. 10)
    • night breaks up the sitting: nox senatum dirimit
    • (ambiguous) while it is still night, day: de nocte, de die
    • (ambiguous) late at night: multa de nocte
    • (ambiguous) in the dead of night; at midnight: intempesta, concubia nocte
  • nox in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
  • nox in William Smith, editor (1848) A Dictionary of Greek Biography and Mythology, London: John Murray