[] a person, an organization or a thing that is thought to be the best or most successful of a particular type（人、机构、事物中的）首屈一指者，最重要者，大王◆Nokia, king of the mobile phone industry诺基亚，移动电话业之王●sb/sth is ˈkingthe person or thing mentioned is the most important part of sth and should be considered carefully（人或事物）是…大王◆In this industry, the customer is king.在这个行业，顾客就是大王。◆The first rule of web development is that content is king.网络开发的第一项规则即内容为王。