N-COUNT-COLL [with singular or plural verb]上层阶级;上等阶层;上流社会 The upper class or the upper classes are the group of people in a society who own the most property and have the highest social status, and who may not need to work for money. 上层阶级;上等阶层;上流社会
...goods specifically designed to appeal to the tastes of the upper class.
专门为迎合上流社会品位而设计的商品
Many of the British upper classes are no longer very rich.
英国的上流社会许多人已不再富得流油。
SYN aristocracy, nobility, gentry, peerage
Upper class is also an adjective.
All of them came from wealthy, upper class families.