| • | Any aquatic carnivorous mammal of the families Phocidae and Otariidae. |
| • | 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. |
| • | 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. |
| • | That which seals or fastens; esp., the wax or wafer placed on a letter or other closed paper, etc., to fasten it. |
| • | That which confirms, ratifies, or makes stable; that which authenticates; that which secures; assurance. |
| • | 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. |
| • | To set or affix a seal to; hence, to authenticate; to confirm; to ratify; to establish; as, to seal a deed. |
| • | 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. |
| • | To fasten with a seal; to attach together with a wafer, wax, or other substance causing adhesion; as, to seal a letter. |
| • | Hence, to shut close; to keep close; to make fast; to keep secure or secret. |
| • | To fix, as a piece of iron in a wall, with cement, plaster, or the like. |
| • | To close by means of a seal; as, to seal a drainpipe with water. See 2d Seal, 5. |
| • | Among the Mormons, to confirm or set apart as a second or additional wife. |
| • | To affix one's seal, or a seal. |
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