- a person or group besides the two primarily involved in a situation, especially a dispute（局势中, 尤指冲突中的）第三者, 第三方。
attrib.
1- of or relating to a person or group besides the two primarily involved in a situation第三方的, 第三者的：
third-party suppliers.
第三方供货商。
1.1
- Brit. (of insurance) covering damage or injury suffered by a person other than the insured〈英〉（保险）第三者责任保险。