majority 与 plurality 的翻译都含有“多数”的意思。majority 指超过半数的多数。plurality 指的是没有超过半数的多数，或称相对多数(relative majority)。
A majority, also known as a simple majority in the U.S., is a subset of a group consisting of more than half of the group. This should not be confused with a plurality, which is a subset having the largest number of parts.
A plurality is not necessarily a majority, as the largest subset may be less than half of the entire group. In British English, majority and plurality are often used as synonyms;
举例：She won the election by a clear majority, gaining 65 of the l00 votes cast．(她以明显的多数赢得选举，在所投的100张票中得了650票。) plurality就不能替代这个句子中的majority。
同样的道理，“压倒多数”，只能译为overwhelming majority，而不可译为overwhelming plurality。因为连半数都没有超过，就算不了“压倒”。