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plafond

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Etymology and origin of the French word plafond

Confidence
Established
Formation
Compound
First attested
1546 Jean Martin, translation of the Songe de Poliphile More words from the 16th century
Ultimate origins
Ancient Greek πλατύςLatin fundus
Etymology tree
inherited borrowed derived
French plat
French plafond
From the same root
French plateau ← plat
French platitude ← plat

Pronunciation

Forms

plafond m (plural plafonds)[1] First written platfons (1546), also platfond and plaifonds; the spelling plafond is recorded in 1558.[2][3][4]

Etymology

It is a compound from French plat + fond, properly a flat bottom.[2][5][6][7][1] Rey explains that the word first meant a flat horizontal partition seen as the bottom of the space above it, under the floor, and changed its value once that partition was seen from below, as the opposite of the plancher.[6] The FEW places it under Latin fundus (“bottom”).[8] Plat goes back to Vulgar Latin *plattus, itself from Ancient Greek πλατύς (platús, “flat, broad”), and fond to the same Latin noun.[4][1][9]

Earliest recorded meaning

It first appears as platfons in 1546, in Jean Martin's French translation of Francesco Colonna's Songe de Poliphile, as an architectural term for the flat surface closing the top of a covered space.[2][6]

Semantic evolution

From architecture the word passed to painting, for a picture painted on a ceiling (1639, in a letter to Poussin).[2][6] In popular speech it stood for the head: avoir un hanneton dans le plafond (1866) and avoir une araignée au plafond (1867) mean “to be crazy”, se faire sauter le plafond (1863) “to blow one's brains out”, and être bas de plafond (1867) first meant “to be very short”, then “to be dim-witted”.[2][6]

By metaphor it was used of low clouds (1883 in a Savoyard dialect dictionary, 1888), a regional use that became general in meteorology in 1916, the year it also took the aviation sense of a plane's maximum altitude.[2][6] The abstract sense “maximum that cannot be exceeded” appears in sport in 1926 and spread through economics (1932), giving crever le plafond (1941) and prix plafond, the opposite of plancher.[2][6]

Timeline

  • 1546 – Platfons appears in Jean Martin's Songe de Poliphile.[2][6]
  • 1558 – The spelling plafond is recorded in the royal building accounts.[2]
  • 1639 – Used in painting, in a letter to Poussin.[2][6]
  • 1680 – Richelet records the spelling plafond.[3]
  • 1866 – Avoir un hanneton dans le plafond “to be crazy”.[2][6]
  • 1867 – Avoir une araignée au plafond and être bas de plafond.[2][6]
  • 1916 – Meteorological and aviation senses (cloud ceiling, maximum altitude).[2]
  • 1926 – The figurative sense “maximum” appears in sport.[2][6]
  • 1941 – Crever le plafond des prix is recorded.[2]

Meanings

Noun

  1. The ceiling of a room, the surface that closes it at the top.[10][11]
  2. Faux plafond: a false ceiling, set below the real one.[10][7]
  3. The upper inner surface of a vehicle or other enclosed space, such as a mine gallery.[10][11]
  4. (fine arts) A painting decorating a ceiling.[11][2]
  5. (meteorology) The height of the cloud base, the cloud ceiling.[2][6]
  6. (aviation) The maximum altitude an aircraft can reach.[11][2]
  7. An upper limit, a maximum that cannot be exceeded, often in apposition: prix plafond.[11][10]
  8. (law) The upper limit of the earnings on which social security contributions are levied, or of the income allowed for certain benefits.[11]

Word family

  • plafonner
  • plafonnier
  • plafonnage
  • plafonneur
  • plafonnement

Usage notes

Avoir une araignée au plafond (“to have a spider on the ceiling”) means to be a little crazy, and bas de plafond dim-witted.[10][6] Sauter au plafond is to jump for joy or with surprise.[10]

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n o p q r Trésor de la langue française informatisé (2004), ATILF – CNRS & Université de Lorraine, atilf.fr/tlfi; electronic version of Imbs, Paul; Quemada, Bernard, eds. (1971–1994), Trésor de la langue française, Paris: CNRS / Gallimard
  3. ^ a b Guilbert, Louis; Lagane, René; Niobey, Georges, eds. (1971–1978; 1989), Grand Larousse de la langue française, Paris: Larousse
  4. ^ a b Bloch, Oscar; Wartburg, Walther von (1989), Dictionnaire étymologique de la langue française, 8th ed., Paris: Presses universitaires de France
  5. ^ Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  6. ^ a b c d e f g h i j k l m n Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  7. ^ a b Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
  8. ^ Wartburg, Walther von, et al. (1922–2002), Französisches Etymologisches Wörterbuch, 25 vols., Bonn / Leipzig / Basel: Klopp / Teubner / Zbinden, p. 3, 873b
  9. ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter
  10. ^ a b c d e f Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert
  11. ^ a b c d e f Dictionnaire de français Larousse, larousse.fr/dictionnaires/francais (accessed 2024)
Cite this entry

“Plafond.” Etymologically, 14 Nov. 2026, etymologically.com/fr/plafond. Accessed 15 Nov. 2026.

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