Definition of "Pledge" :

noun: a binding commitment to do or give or refrain from something

"Signed a pledge never to reveal the secret."

noun: a drink in honor of or to the health of a person or event

noun: someone accepted for membership but not yet fully admitted to the group

noun: a deposit of personal property as security for a debt

"His saxophone was in pledge."

verb: promise solemnly and formally

"I pledge that I will honor my wife."

verb: bind or secure by a pledge

"I was pledged to silence."

verb: give as a guarantee

"I pledge my honor."

verb: propose a toast to

verb: pay (an amount of money) as a contribution to a charity or service, especially at regular intervals

"I pledged $10 a month to my favorite radio station."