1
- having or functioning on two levels; arranged on two planes双层的, 具有两层的; 双层排列的：
the unit's bi-level design keeps water in the sink.
这个配件的双层设计使水留在水槽里。
1.1
- N. Amer. denoting a style of two-storey house in which the lower storey is partially sunk below ground level, and the main entrance is between the two storeys〈北美〉错层入口的（指一种二层楼房, 底层有一半在地面以下, 入口在半层处）。
1.2
- denoting a railway carriage with seats on two levels（火车车厢）双层的。
- N. Amer. a bi-level house〈北美〉错落式双层房屋：
a three-bedroom bi-level.
有三间卧室的错层式双层住房。