n.

1. 鸽舍出入口
2. 小房间
3. 文件架上的小间隔

vt.

1. 把……搁在分类架上；把……留在记忆中；缓办
2. 把……隔成小格

n.

1. a small recess for a domestic pigeon to nest in.
2. each of a set of small compartments where letters or messages may be left for individuals.
3. a category, especially an overly restrictive one, to which someone or something is assigned.

v.

1. assign to a particular category, especially an overly restrictive one.
2. deposit (a document) in a pigeonhole.