a solemn promise or agreement to do or refrain from doing something

a pledge of aid; a pledge not to wage war.

something delivered as security for the payment of a debt or fulfillment of a promise, and subject to forfeiture on failure to pay or fulfill the promise.

the state of being given or held as security

to put a thing in pledge.

Law .

the act of delivering goods, property, etc., to another for security.

the resulting legal relationship.

something given or regarded as a security.

a person accepted for membership in a club, fraternity, or sorority, but not yet formally approved.

an assurance of support or goodwill conveyed by drinking a person's health; a toast.

Obsolete .

a hostage.

a person who becomes bail or surety for another.

to bind by or as if by a pledge

to pledge hearers to secrecy.

to promise solemnly

to pledge one's support.

to give or deposit as a pledge; pawn.

to stake, as one's honor.

to secure by a pledge; give a pledge for.

to accept as a pledge for club, fraternity, or sorority membership.

to drink a health or toast to.

to make or give a pledge

to pledge for someone.

to drink a pledge; toast someone's health, success, etc. ?

take the pledge, to make a solemn

formal vow to abstain from intoxicating drink.