Definition 2023





aliēnus m (feminine aliēna, neuter aliēnum); first/second declension

  1. Of that which belongs to another person, place, or object—of another, alien, foreign
  2. unfriendly, inimical, hostile, suspicious
  3. unfamiliar with something or a stranger to something
  4. unsuitable, incongruous, inconsistent
  5. (of the body) dead; corrupted; paralyzed
  6. (of the mind) insane, mad


First/second declension.

Number Singular Plural
Case / Gender Masculine Feminine Neuter Masculine Feminine Neuter
nominative aliēnus aliēna aliēnum aliēnī aliēnae aliēna
genitive aliēnī aliēnae aliēnī aliēnōrum aliēnārum aliēnōrum
dative aliēnō aliēnō aliēnīs
accusative aliēnum aliēnam aliēnum aliēnōs aliēnās aliēna
ablative aliēnō aliēnā aliēnō aliēnīs
vocative aliēne aliēna aliēnum aliēnī aliēnae aliēna


  • Old Portuguese: allẽo
  • Old Spanish: ageno
  • Sardinian: anzenu, agnenu


  • alienus in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • alienus in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • ALIENUS in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
  • Félix Gaffiot (1934), “alienus”, in Dictionnaire Illustré Latin-Français, Paris: Hachette.
  • Meissner, Carl; Auden, Henry William (1894) Latin Phrase-Book, London: Macmillan and Co.
    • (ambiguous) to consider a thing beneath one's dignity: aliquid alienum (a) dignitate sua or merely a se ducere
    • (ambiguous) the expression is not in accordance with Latin usage: aliquid a consuetudine sermonis latini abhorret, alienum est
    • (ambiguous) to have an inclination for a thing: propensum, proclivem esse ad aliquid (opp. alienum, aversum esse, abhorrere ab aliqua re)
    • (ambiguous) to incur debts: aes alienum (always in sing.) facere, contrahere
    • (ambiguous) to incur debts on a large scale: grande, magnum (opp. exiguum) aes alienum conflare
    • (ambiguous) to get into debt: incidere in aes alienum
    • (ambiguous) to be in debt: aes alienum habere
    • (ambiguous) to pay one's debts: aes alienum dissolvere, exsolvere