CACHET
cachet
(noun) a seal on a letter
cachet, lettre de cachet
(noun) a warrant formerly issued by a French king who could warrant imprisonment or death in a signed letter under his seal
cachet, seal, seal of approval
(noun) an indication of approved or superior status
Source: WordNet® 3.1
Etymology
Noun
cachet (countable and uncountable, plural cachets)
(archaic) A seal, as of a letter.
(figurative) A special characteristic or quality; prestige.
Synonyms: charm, je ne sais quoi, magic touch, oomph, zing
(philately) A commemorative stamped design or inscription on an envelope, other than a cancellation or pre-printed postage.
A sealed envelope containing an item whose price is being negotiated.
(medicine) A capsule containing a pharmaceutical preparation.
A hidden location from which one can observe birds while remaining unseen.
Usage notes
Sometimes confused with cache.
Verb
cachet (third-person singular simple present cachets, present participle cacheting, simple past and past participle cacheted)
(transitive, philately) To mark (an envelope) with a commemorative stamped design or inscription.
Source: Wiktionary
Cach"et, n. Etym: [F. fr. cacher to hide.]
Definition: A seal, as of a letter. Lettre de cachet Etym: [F.], 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.
Source: Webster’s Unabridged Dictionary 1913 Edition