n.

1. 空；空白；空间[U]
   the stark vacancy of the arctic landscape

   北极景色的极端空白

2. 空处；空地；空房[C]
   There is a vacancy on the tenth floor.

   第十层楼上有一个空房间。

3. 空缺；空职；空额[C][（+for）]
   We have a vacancy for a computer programmer.

   我们有一个电脑编程师缺额。

4. （心灵的）空虚；失神，心不在焉[U]
   The vacancy of the boy's expression made Father doubt if he was listening.

   儿子毫无表情使父亲怀疑他是否在专心听。

n.

1. an unoccupied position or job.
2. an available room in a hotel, guest house, etc.
3. empty space.
4. lack of intelligence or understanding.