1. (因恼怒、担心、困惑、全神贯注等而)皱眉，蹙额
When someone frowns, their eyebrows become drawn together, because they are annoyed, worried, or puzzled, or because they are concentrating.
e.g. Nancy shook her head, frowning...
南希摇了摇头，皱着眉头。
e.g. He frowned at her anxiously.
他不安地朝她皱了皱眉。
2. 反对;不赞成;不同意
If something is frowned upon or is frowned on people disapprove of it.
e.g. This practice is frowned upon as being wasteful...
这种行为被认为是浪费而不获认可。
e.g. Many teachers frown on such practices.
许多教师不赞同这样的做法。
相关词组：frown upon