someone other than the principals who are involved in a transaction
a political party organized in opposition to the major parties in a two-party system
third party例句
A third party is formed by the fusion of independent republican and democrats.
一个第三党由共和党和民主党之独立份子联合而组成。
Money, property, a deed, or a bond put into the custody of a third party for delivery to a grantee only after the fulfillment of the conditions specified.