1. 联合政府
    A coalition is a government consisting of people from two or more political parties.

    e.g. Since June the country has had a coalition government...
           从6月份起，该国一直由一个联合政府执掌政权。
    e.g. It took five months for the coalition to agree on and publish a medium-term economic programme.
           联合政府花了5个月的时间才达成并公布了一项中期经济计划。

2. (政党、社团等的)同盟，联盟
    A coalition is a group consisting of people from different political or social groups who are co-operating to achieve a particular aim.

    e.g. He had been opposed by a coalition of about 50 civil rights, women's and Latino organizations.
           大约有50个民权组织、女性社团和拉丁裔社团联合起来反对他。