SEAL (3)

Seal, v. t. [imp. & p. p. Sealed (?); p. pr. & vb. n. Sealing.] [[OE. selen; cf. OF. seeler, seieler, F. sceller, LL. sigillare. See Seal a stamp.]] 1. 1. To set or affix a seal to; hence, to authenticate; to confirm; to ratify; to establish; as, to seal a deed.
And with my hand I seal my true heart's love. Shak. 2. 2. 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.
3. 3. To fasten with a seal; to attach together with a wafer, wax, or other substance causing adhesion; as, to seal a letter.
4. 4. Hence, to shut close; to keep close; to make fast; to keep secure or secret.
Seal up your lips, and give no words but “mum”. Shak. 5. 5. To fix, as a piece of iron in a wall, with cement, plaster, or the like. Gwilt.
6. 6. To close by means of a seal; as, to seal a drainpipe with water. See 2d Seal, 5.
7. 7. Among the Mormons, to confirm or set apart as a second or additional wife.
If a man once married desires a second helpmate . . . she is sealed to him under the solemn sanction of the church. H. Stansbury.