silent majority

Từ điển Oxford Advanced Learner 8th

▪ I. the ˌsilent maˈjority [silent majority] BrE NAmE noun usually singular
the large number of people in a country who think the same as each other, but do not express their views publicly
•It is time the silent majority made their opposition known.
 
▪ II. the silent majority [the silent majority] BrE NAmE noun [pl]
the majority of people in a country, who do not have extreme opinions about political or moral matters, and who do not express their opinions in public. Many people think of the silent majority as being old-fashioned and opposed to change
•She claims to speak for the silent majority who have always wanted peace in the province.