[, ] () a fixed price at which a unit of a currency can be bought; a system in which there is a fixed relationship between the value of two currencies 固定平价；固定比价◆The US dollar was convertible to gold at a fixed parity. 美元当时可按固定比价兑换为黄金。◆The currency has fixed parity against the euro. 这种货币对欧元有固定比价。