The difference between Ceiling and Roof

When used as nouns, ceiling means the overhead closure of a room, whereas roof means the external covering at the top of a building.

Roof is also verb with the meaning: to cover or furnish with a roof.

check bellow for the other definitions of Ceiling and Roof

Ceiling as a noun:

The overhead closure of a room.

Examples:

"the dining room had an ornate ceiling'"
Ceiling as a noun:

The upper limit of an object or action.

Examples:

"price ceilings'"
Ceiling as a noun ([[aviation]]):

The highest altitude at which an aircraft can safely maintain flight.
Ceiling as a noun ([[meteorology]]):

The measurement of visible distance from ground or sea level to an overcast cloud cover; under a clear sky, the ceiling measurement is identified as "unlimited."

Examples:

"Even though it was cloudy, there was still enough ceiling for the [[w:Blue Angels Blue Angels]] to perform a great show."
Ceiling as a noun (mathematics):

The smallest integer greater than or equal to a given number.

Examples:

"the ceiling of 4.5 is 5, the ceiling of -4.5 is -4"
Ceiling as a noun (nautical):

The inner planking of a vessel.

Roof as a noun:

The external covering at the top of a building
Roof as a noun:

The upper part of a cavity.

Examples:

"The palate is the roof of the mouth."

"Archaeologists discovered that the cave's roof was decked with paintings."
Roof as a noun (mining):

The surface or bed of rock immediately overlying a bed of coal or a flat vein.

Roof as a verb:

To cover or furnish with a roof.
Roof as a verb:

To traverse buildings by walking or climbing across their roofs.
Roof as a verb (slang):

To put into prison for not a short time.