adj.有定义的；明确的，确定的，清晰的；轮廓分明的
v.规定；限定；定义；解释（动词define的过去式和过去分词）
The powers of the police need to be clearly defined. 必须对警方的权限作出明确的规定。
The powers of a judge are defined by law. 法官的权限是由法律规定的。
When boundaries between countries are not clearly defined, there is usually trouble. 国与国之间的边界未明确划定时，通常会发生纠纷。
