Definitions from Wiktionary ( )

▸ verb:  To make a solemn promise (to do something).
▸ verb:  To deposit something as a security; to pawn.
▸ verb:  (transitive) To give assurance of friendship by the act of drinking; to drink to one's health.
▸ noun:  A solemn promise to do something.
▸ noun:  (with the) A promise to abstain from drinking alcohol.
▸ noun:  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.
▸ noun:  (law) A bailment of personal property to secure payment of a debt without transfer of title.
▸ noun:  The personal property so pledged, to be kept until the debt is paid.
▸ noun:  (university slang) A person who has taken a pledge of allegiance to a college fraternity, but is not yet formally approved.
▸ noun:  A drinking toast.

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