Meaning

• A solemn promise to do something.

• A security to guarantee payment of a debt.

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

• A drinking toast.

Meaning

• To make a solemn promise (to do something).

• To deposit something as a security; to pawn.

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