a person or group that offers to pay an amount of money to buy sth 出价者◆The company's assets will be sold to the highest bidder. 公司的资产将卖给最高的出价者。
a person or group that offers to do work or to provide a service for a particular price, in competition with others 投标者◆The group is one of six bidders competing for the $500 million contract. 集团是竞争 5 亿元合同的六个投标者之一。