ˈɪnstɹəmənt səʊk soʊk borrowing and leaving an article as security for repayment of the loan leave as a guarantee in return for money pawn your grandfather's gold watch (chess) the least powerful piece; moves only forward and captures only to the side; it can be promoted to a more powerful piece if it reaches the 8th rank a person used by another to gain an end an article deposited as security