A solemn promise to do something, particularly a promise to abstain from drinking alcohol.

An asset or person temporarily handed over to guarantee the fulfilment of something promised, under threat of permanent loss of the thing handed over; surety, security, hostage.

(law) A bailment of personal property that is used to secure payment of a debt without transferring ownership, and refers to the personal property itself that is held until the debt is paid.

(university slang) A person who has taken a pledge of allegiance to a college fraternity, but is not yet formally approved.

A drinking toast.

To make a solemn promise (to do something).

To deposit something as a security; to pawn.

(transitive) To give assurance of friendship by the act of drinking; to drink to one's health.