a person or thing that takes or can take the place of another
an athlete who plays only when a starter on the team is replaced
put in the place of another; switch seemingly equivalent items; "the con artist replaced the original with a fake Rembrandt"; "substitute regular milk with fat-free milk"
be a substitute; "The young teacher had to substitute for the sick colleague"; "The skim milk substitutes for cream--we are on a strict diet"
act as a substitute; "She stood in for the soprano who suffered from a cold"
(bridge or whist) the suit that has been declared to rank above all other suits for the duration of the hand; "clubs were declared trumps"; "a trump can take a trick even when a card of a different suit is led"
a playing card in the suit that has been declared trumps; "the ace of trumps is a sure winner"
borrowing and leaving an article as security for repayment of the loan
(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
an article deposited as security
leave as a guarantee in return for money; "pawn your grandfather's gold watch"