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.

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 fasten with a seal; to attach together with a wafer,
wax, or other substance causing adhesion; as, to seal a letter.

To set or affix a seal to; hence, to authenticate; to
confirm; to ratify; to establish; as, to seal a deed.

That which confirms, ratifies, or makes stable; that which
authenticates; that which secures; assurance.

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.

Any aquatic carnivorous mammal of the families Phocidae and
Otariidae.

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.

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.