See also: Somnus



From Proto-Italic *swepnos, from Proto-Indo-European *swépnos, from the root *swep- (to sleep) (compare Lithuanian sãpnas).



somnus m (genitive somnī); second declension

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  1. sleep
  2. drowsiness, slumber sloth, idleness
  3. (figurative) death


Second-declension noun.

Case Singular Plural
Nominative somnus somnī
Genitive somnī somnōrum
Dative somnō somnīs
Accusative somnum somnōs
Ablative somnō somnīs
Vocative somne somnī

Derived termsEdit

Related termsEdit


  • Aromanian: somnu
  • Asturian: sueñu
  • Catalan: son
  • Dalmatian: samno
  • Franco-Provençal: sono
  • French: sommeil, somme
  • Friulian: sium
  • Galician: sono
  • Italian: sonno
  • Ligurian: séunno


  • somnus in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • somnus in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • somnus in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
  • somnus in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français, Hachette
  • Carl Meissner; Henry William Auden (1894) Latin Phrase-Book[1], London: Macmillan and Co.
    • to lay oneself down to slee: somno or quieti se tradere
    • to be unable to sleep: somnum capere non posse
    • I cannot sleep for anxiety: curae somnum mihi adimunt, dormire me non sinunt
    • I haven't had a wink of sleep: somnum oculis meis non vidi (Fam. 7. 30)
    • to fall fast asleep: artus somnus aliquem complectitur (Rep. 6. 10)
    • to be overcome by sleep: somno captum, oppressum esse
    • to awake: somno solvi
    • to rouse, wake some one: (e) somno excitare, dormientem excitare
    • in a dream: per somnum, in somnis
    • to see something in a dream: in somnis videre aliquid or speciem
    • I dreamed I saw..: in somnis visus (mihi) sum videre
    • to refresh oneself, minister to one's bodily wants: corpus curare (cibo, vino, somno)
  • somnus in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
  • somnus in William Smith, editor (1848) A Dictionary of Greek Biography and Mythology, London: John Murray