<p><strong>Noun</strong></p><ul><li>A solemn promise or agreement to do or refrain from doing something: a pledge of aid; a pledge not to wage war.</li><li>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.</li><li>Synonyms: guaranty, surety, warranty</li><li>The state of being given or held as security: to put a thing in pledge.</li><li>Law: the act of delivering goods, property, etc., to another for security.</li><li>The resulting legal relationship.</li><li>Something given or regarded as security.</li><li>A person accepted for membership in a club, fraternity, or sorority, but not yet formally approved.</li><li>An assurance of support or goodwill conveyed by drinking a person's health; a toast.</li><li>Obsolete: a hostage.</li><li>A person who becomes bail or surety for another.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) pledged, pledging.</li><li>To bind by or as if by a pledge: to pledge hearers to secrecy.</li><li>To promise solemnly: to pledge one's support.</li><li>To give or deposit as a pledge; pawn.</li><li>To stake, as one's honor.</li><li>To secure by a pledge; give a pledge for.</li><li>To accept as a pledge for club, fraternity, or sorority membership.</li><li>To drink a health or toast to.</li></ul><p><strong>Verb</strong></p><ul><li>(used without object) pledged, pledging.</li><li>To make or give a pledge: to pledge for someone.</li><li>To drink a pledge; toast someone's health, success, etc.</li></ul>