Emily Dickinson Lexicon

SEAL, n.² [Sax. sigel, sigle; G. siegel; D. zegel; Dan. seigl, segl; Fr. sceau; Arm. syell; L. sigillum; It. sigillo; Sp. sigilo. It is uncertain what was the original signification of seal, whether an image or some ornament. In Saxon, the word signifies a necklace, or ornament for the neck, a stud or boss, a clasp, and a seal.]

1. A piece of metal or other hard substance, usually round or oval, on which is engraved some image or device, and sometimes a legend or inscription. This is used by individuals, corporate bodies, and states, for making impressions on wax upon instruments of writing, as an evidence of their authenticity. The king of England has his great seal and his privy seal. Seals are sometimes worn in rings.
2. The wax set to an instrument, and impressed or stamped with a seal. Thus we give a deed under hand and seal. Wax is generally used in sealing instruments, but other substances may be used.
3. The wax or wafer that makes fast a letter or other paper.
4. Any act of confirmation. – Milton.
5. That which confirms, ratifies, or makes stable; assurance. – 2 Tim. ii.
6. That which effectually shuts, confines, or secures; that which makes fast. – Rev. xx.