n.

1. 下定義；定義；釋義[U][C]
   the definitions in a dictionary

   詞典中的字義

2. 限定；定界；規定[U][C]
   The club must give a clear definition of its goals.

   俱樂部應對其宗旨作明確規定。

3. （輪廓等的）清晰[U]
4. （透鏡等的）解析度[U]
5. 【物】【攝】清晰度[U]
   This photograph lacks definition.

   這張相片不清晰。

n.

1. a formal statement of the exact meaning of a word.
   ▸an exact description of the nature, scope, or meaning of something.
   ▸the action or process of defining.
2. the degree of distinctness in outline of an object or image.