1. (noun) an upper limit on what is allowed

• cap
• roof

1. (noun) the overhead upper surface of a covered space

• overhead

2. (noun) an upper limit on what is allowed

• glass ceiling

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

• absolute ceiling
• combat ceiling
• service ceiling

1. (noun) the overhead upper surface of a covered space

• upper surface

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

• altitude
• height

3. (noun) an upper limit on what is allowed

• control

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

• altitude
• height

1. (noun) (meteorology) altitude of the lowest layer of clouds

• meteorology

1. (noun) an upper limit on what is allowed

• cap