1. A mark or quality, as of distinction, individuality, or authenticity: "federal courts have a certain cachet which state courts lack” ( christian science monitor).
2. A seal on a document, such as a letter.
3. A commemorative design stamped on an envelope to mark a postal or philatelic event.
4. A motto forming part of a postal cancellation.
5. A kind of wafer capsule formerly used by pharmacists for presenting an unpleasant-tasting drug.

1. A special characteristic or quality.
2. A seal, as of a letter.

1. A seal, as of a letter.

1. A seal.
2. A distinguishing mark or stamp.
3. in pharmacy, a hollow wafer containing medicine in powder form.

1. a warrant formerly issued by a french king who could warrant imprisonment or death in a signed letter under his seal
2. a seal on a letter
3. an indication of approved or superior status