plancher

French planche.

plancher (plural planchers)

1. A floor made of wood.
2. A plank.
   • 1627 (indicated as 1626), Francis [Bacon], “(please specify the page, or |century=I to X)”, in Sylua Syluarum: Or A Naturall Historie. In Ten Centuries. […], London: […] William Rawley […]; [p]rinted by J[ohn] H[aviland] for William Lee […], →OCLC:

     Elm; [used] some for planchers

3. (architecture) The underside of a cornice; a soffit.

plancher (third-person singular simple present planchers, present participle planchering, simple past and past participle planchered)

1. (obsolete, transitive) To form using planks.
   • 1586, Conrad Heresbach, Foure Bookes of Husbandrie:

     your stable be well paved with rounde stone, wel planchered and kept clean

• “plancher”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.

• IPA^(key): /plɑ̃.ʃe/

• Audio:

  (file)

From planche.

plancher m (plural planchers)

1. floor
2. lower limit
3. (anatomy) floor

• débarrasser le plancher
• mettre le pied au plancher
• pied au plancher
• plancher des vaches

From planche.

plancher

1. (intransitive) to study something thoroughly, to work hard on something, to brainstorm

   J'ai planché sur le sujet.

   I have made extensive research on the topic.

   • 2025 June 9, François Tonneau, ““Mettre fin à la pêche illégale” : l'alerte des scientifiques”, in La Provence, →ISSN:

     […] une centaine de scientifiques ont donc planché toute la semaine, préparant leurs recommandations, avant de les restituer ce dimanche à Emmanuel Macron et un aréopage de personnalités.

     (please add an English translation of this quotation)

• “plancher”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.