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See also: plānus


Etymology 1[edit]

From Proto-Italic *plānos, from Proto-Indo-European *pleh₂-no-s (flattened), from *pleh₂-. Further related to Latin palma, planta, plautus, palam, palātum, and likely pellō.



plānus (feminine plāna, neuter plānum, comparative planior, superlative planissimus, adverb plānē); first/second-declension adjective

  1. level, flat, even
  2. intelligible, clear

First/second-declension adjective.

Number Singular Plural
Case / Gender Masculine Feminine Neuter Masculine Feminine Neuter
Nominative plānus plāna plānum plānī plānae plāna
Genitive plānī plānae plānī plānōrum plānārum plānōrum
Dative plānō plānō plānīs
Accusative plānum plānam plānum plānōs plānās plāna
Ablative plānō plānā plānō plānīs
Vocative plāne plāna plānum plānī plānae plāna
Derived terms[edit]
  • Asturian: llanu, planu (borrowing)
  • Basque: lau
  • Catalan: pla
  • French: plan (borrowing), plain
  • Friulian: plan
  • Galician: chan, chá
  • Italian: piano

Etymology 2[edit]

From Ancient Greek πλάνος (plános)



planus m (genitive planī); second declension

  1. a tramp, hobo, vagabond, bum
  2. a cheat, impostor

Second-declension noun.

Case Singular Plural
Nominative planus planī
Genitive planī planōrum
Dative planō planīs
Accusative planum planōs
Ablative planō planīs
Vocative plane planī


  • planus in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • planus in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • planus in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
  • planus in Gaffiot, Félix (1934) Dictionnaire illustré Latin-Français, Hachette
  • Carl Meissner; Henry William Auden (1894) Latin Phrase-Book[1], London: Macmillan and Co.
    • level country; plains: loca plana or simply plana