I. ˈsig-nət noun
Etymology: Middle English small seal, signet ring, from Anglo-French, diminutive of signe sign, seal
Date: 14th century
1. : a seal used officially to give personal authority to a document in lieu of signature
2. : the impression made by or as if by a signet
3. : a small intaglio seal (as in a finger ring)
II. transitive verb
Date: 15th century
: to stamp or authenticate with a signet