/ka shay", kash"ay/ ; Fr. /kann she"/ , n. , pl. cachets /ka shayz", kash"ayz/ ; Fr. /kann she"/ .
1. an official seal, as on a letter or document.
2. a distinguishing mark or feature; stamp: Courtesy is the cachet of good breeding.
3. a sign or expression of approval, esp. from a person who has a great deal of prestige.
4. superior status; prestige: The job has a certain cachet.
5. Pharm. a hollow wafer for enclosing an ill-tasting medicine.
6. Philately. a firm name, slogan, or design stamped or printed on an envelope or folded letter.
[ 1630-40; cache CACHE + -et -ET ]