lettre de cachet

[le-truh duh ka-she]

noun, plural let·tres de ca·chet [le-truh duh ka-she] /lɛ trə də kaˈʃɛ/. French.

a letter under the seal of the sovereign, especially one ordering imprisonment, frequently without trial.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for lettre de cachet

lettre de cachet

noun plural lettres de cachet (lɛtrə də kaʃɛ)

French history a letter under the sovereign's seal, often authorizing imprisonment without trial

Word Origin for lettre de cachet

literally: letter with a seal
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012