A domain is a particular field of thought, activity, or interest, especially one over which someone has control, influence, or rights. 领域
noun [抽象名词] 领域，范围；领土，势力范围；（因特网上的）域；（函数的）定义域；地产
On the Internet, a domain is a set of addresses that shows, for example, the category or geographical area that an Internet address belongs to. (网络) 域
