층

〔層〕

1. layer
One of several layers of different substances or objects stacked horizontally, or the state of things being stacked that way.

2. story
An area of the same height inside a building that has been built in multiple stories.

3. class
The people in a group who have a similar social status, wealth, level, interests, etc.

4. floor
A unit used to count the area on the same floor of a building, numbered from bottom to the top.