n.

1. 分開；分離[U][C]
   Lengthy separation of the boy from his mother could lead to psychological problems.

   這男孩長期與母親分開會導致心理上的問題。

2. （郵件等的）分揀[U]
3. 分隔線，分隔點；間隔；分隔物[C]
4. 【律】（夫婦）分居[U][C]

n.

1. the action or state of separating or being separated.
   ▸the state in which a husband and wife remain married but live apart:

   a trial separation.
2. distinction between the signals carried by the two channels of a stereophonic system.
3. Physics  & Aeronautics  the generation of a turbulent boundary layer between a surface and a moving fluid.