planus

See also: plānus

Latin

Etymology 1

From Proto-Italic *plānos, from Proto-Indo-European *pleh₂-no-s, from *pleh₂- (“flat”).

Pronunciation

(Classical) IPA^(key): /ˈplaː.nus/, [ˈpɫaː.nʊs]

Adjective

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

level, flat, even
intelligible, clear

Declension

First/second-declension adjective.

Case / Gender	Masculine	Feminine	Neuter	Masculine	Feminine	Neuter
Number	Singular			Plural
Nominative	plānus	plāna	plānum	plānī	plānae	plāna
Genitive	plānī	plānae	plānī	plānōrum	plānārum	plānōrum
Dative	plānō	plānae	plānō	plānīs
Accusative	plānum	plānam	plānum	plānōs	plānās	plāna
Ablative	plānō	plānā	plānō	plānīs
Vocative	plāne	plāna	plānum	plānī	plānae	plāna

Derived terms

plānē
plānitās
plānitūdō

Descendants

Asturian: llanu, planu (borrowing)
Basque: lau
Catalan: pla
English: piano, plain, plan
French: plan (borrowing), plain
Friulian: plan
Galician: chan, chá
German: Plan
Italian: piano

Occitan: plan
Old Portuguese: chão, prão (semi-learned)
Portuguese: plano (borrowing), chão, porão (semi-learned), piano (via Italian)
Romanian: plan (borrowing)
Romansh: plàn, planiv
Sicilian: chianu
Spanish: llano, plano (borrowing)

Etymology 2

From Ancient Greek πλάνος (plános)

Pronunciation

(Classical) IPA^(key): /ˈpla.nus/, [ˈpɫa.nʊs]

Noun

planus m (genitive planī); second declension

a cheat, impostor.

Declension

Second-declension noun.

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

References

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, London: Macmillan and Co.
- level country; plains: loca plana or simply plana

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