seal

1. n. Any aquatic carnivorous mammal of the families Phocidae and Otariidae. Source: opted

2. n. An engraved or inscribed stamp, used for marking an impression in wax or other soft substance, to be attached to a document, or otherwise used by way of authentication or security. Source: opted

3. n. Wax, wafer, or other tenacious substance, set to an instrument, and impressed or stamped with a seal; as, to give a deed under hand and seal. Source: opted

4. n. That which seals or fastens; esp., the wax or wafer placed on a letter or other closed paper, etc., to fasten it. Source: opted

5. n. That which confirms, ratifies, or makes stable; that which authenticates; that which secures; assurance. Source: opted

6. n. An arrangement for preventing the entrance or return of gas or air into a pipe, by which the open end of the pipe dips beneath the surface of water or other liquid, or a deep bend or sag in the pipe is filled with the liquid; a draintrap. Source: opted

7. v. t. To set or affix a seal to; hence, to authenticate; to confirm; to ratify; to establish; as, to seal a deed. Source: opted

8. v. t. To mark with a stamp, as an evidence of standard exactness, legal size, or merchantable quality; as, to seal weights and measures; to seal silverware. Source: opted

9. v. t. To fasten with a seal; to attach together with a wafer, wax, or other substance causing adhesion; as, to seal a letter. Source: opted

10. v. t. Hence, to shut close; to keep close; to make fast; to keep secure or secret. Source: opted

11. v. t. To fix, as a piece of iron in a wall, with cement, plaster, or the like. Source: opted

12. v. t. To close by means of a seal; as, to seal a drainpipe with water. See 2d Seal, 5. Source: opted

13. v. t. Among the Mormons, to confirm or set apart as a second or additional wife. Source: opted

14. v. i. To affix one's seal, or a seal. Source: opted

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