absolute ceiling

8.1

The highest height at which a plane can still fly level using its engines

noun
/ˈæb.sə.luːt ˈsiː.lɪŋ/

Specialized

: techo absoluto

The pilot noted that the plane was approaching its absolute ceiling as the air grew thinner.

Examples

Some lightweight aircraft have a lower absolute ceiling than commercial jets.
Engine performance drops significantly as an aircraft nears its absolute ceiling.
The absolute ceiling for this aircraft is 30,000 feet.
Pilots must know the absolute ceiling of their planes.
The pilot reached their absolute ceiling of 40,000 feet during the flight.
To ensure safety, the aircraft's absolute ceiling is carefully calculated before takeoff.
Flying close to the absolute ceiling limits the aircraft's performance and fuel efficiency.

Synonyms

ceiling

vsabsolute ceiling

Specialized

2 6.6

The highest height a plane can reach

is the unconditional highest altitude sustainable in horizontal powered flight

Antonyms

floor

Specialized

31 5.2

A lowest allowed level for a price or wage

How High

high-altitude

20 4.2

absolute ceiling

Specialized

8.1

combat ceiling

Specialized

8.6

low-altitude

5 4.3

Surface Forms

absolute ceiling singular

absolute ceilings plural

Morphology

absolute + ceiling

The phrase is a straightforward composition of 'absolute' (complete, maximal) + 'ceiling' (the highest altitude an aircraft can sustain), so the meaning 'the ultimate maximum altitude' is directly derivable from the constituents. This literal, intensifier + noun pattern is cross-linguistically common and would be understandable to a B1 learner who knows both words.

Etymology

Absolute ceiling uses ceiling like the top or roof of a room and absolute to mean the 'final limit'. It creates the picture of an invisible 'roof' above a plane: when the air becomes too thin the engines can't keep the plane up, so that 'roof' is the highest height the plane can reach using only its engines.