middle class

Từ điển Oxford Advanced Learner 8th

▪ I. ˌmiddle ˈclass [middle class] BrE NAmE noun countable + singular or plural verb
the social class whose members are neither very rich nor very poor and that includes professional and business people
•the upper/lower middle class
•the growth of the middle classes
compare ↑upper class, ↑working class

Example Bank:
•The club has become very middle class.
 
▪ II. the middle class [middle-class the middle class] BrE NAmE noun [C+sing/pl v]
the social class between the ↑working class and the upper class. It consists of people who are generally regarded as having an average status, education, income, etc. in society. In Britain, the middle class is often divided into the upper middle class and the lower middle class. ▶
Derived Word: ↑middle-class