英汉词典

1. 协定；契约；盟约；条约
    A pact is a formal agreement between two or more people, organizations, or governments to do a particular thing or to help each other.

pact的反义词

    e.g. Last month he signed a new non-aggression pact with Germany...
           上个月，他与德国签订了新的互不侵犯条约。
    e.g. The other two opposition parties cannot agree on an electoral pact between themselves.
           另外两个反对党之间无法就选举达成协议。