To bind or engage by promise or declaration; to engage
solemnly; as, to pledge one’s self.

To invite another to drink, by drinking of the cup first,
and then handing it to him, as a pledge of good will; hence, to drink
the health of; to toast.

A sentiment to which assent is given by drinking one’s
health; a toast; a health.

To secure performance of, as by a pledge.

To deposit, as a chattel, in pledge or pawn; to leave in
possession of another as security; as, to pledge one’s watch.

A promise or agreement by which one binds one’s self to do,
or to refrain from doing, something; especially, a solemn promise in
writing to refrain from using intoxicating liquors or the like; as, to
sign the pledge; the mayor had made no pledges.

A person who undertook, or became responsible, for another;
a bail; a surety; a hostage.

The transfer of possession of personal property from a
debtor to a creditor as security for a debt or engagement; also, the
contract created between the debtor and creditor by a thing being so
delivered or deposited, forming a species of bailment; also, that which
is so delivered or deposited; something put in pawn.

A hypothecation without transfer of possession.

To give or pass as a security; to guarantee; to engage; to
plight; as, to pledge one’s word and honor.