let·tre de ca·chet /ˈlɛtrədəˌkæˈʃe/
Cach·et n. A seal, as of a letter.
Lettre de cachet , a sealed letter, especially a letter or missive emanating from the sovereign; -- much used in France before the Revolution as an arbitrary order of imprisonment.
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lettre de cachet
n : a warrant formerly issued by a French king who could warrant
imprisonment or death in a signed letter under his seal
[syn: cachet]