名词

1. 屋顶;天花板
A ceiling is the horizontal surface that forms the top part or roof inside a room.

2. (官方定的价格、工资等的)上限，最高限额
A ceiling on something such as prices or wages is an official upper limit that cannot be broken.

3. 最高飞行限度;升限
A ceiling is the greatest height at which a particular aircraft can fly safely.

1. the overhead upper surface of a covered space

e.g. he hated painting the ceiling

2. (meteorology) altitude of the lowest layer of clouds

3. maximum altitude at which a plane can fly (under specified conditions)

4. an upper limit on what is allowed

e.g. he put a ceiling on the number of women who worked for him
there was a roof on salaries
they established a cap for prices

Synonym: roofcap