[only before noun] third-party (Law 法律 or formal) connected with a company, an organization, a person, etc. that is involved in a situation in addition to the two main people or groups involved第三方的◆third-party suppliers第三方供应商◆The materials that the company buys are checked for quality by independent third-party auditors.这家公司购买的材料的质量由独立的第三方审计人员进行核查。 (Insurance 保险) connected with insurance that covers you if you injure sb or damage sb's property（保险）第三方责任的◆All transport operators must be covered by third-party liability.所有运输经营者必须投保第三方责任险。