Definition of adiabatic in English:


Syllabification: ad·i·a·bat·ic
Pronunciation: /ˌādīəˈbatik, ˌadēə-


  • 1Relating to or denoting a process or condition in which heat does not enter or leave the system concerned.
    More example sentences
    • This is what makes the air cooler higher up: the process is called adiabatic expansion/compression.
    • The quantum and classical Carnot engines therefore operate in the same way - a closed cycle of two isothermal and two adiabatic processes.
    • Working closely with environmental engineers, Arup New York, it settled on a passive climate controlled system known as adiabatic cooling, which takes advantage of the hot arid climate.
  • 1.1Impassable to heat.


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  • A curve or formula representing adiabatic phenomena.
    More example sentences
    • On the thermal plane, the adiabatics appear as straight lines corresponding to different entropies.



Pronunciation: /-ik(ə)lē/
More example sentences
  • Most current machines can therefore rely on inertial cooling - in other words the components are simply allowed to heat up adiabatically and then cooled slowly between pulses.
  • The latter ensures that a ‘fossil record’ of any heating or cooling is kept even if the gas subsequently changes its pressure adiabatically (under energy conservation).
  • The batch of mantle ascends adiabatically, whereas the geotherm becomes conductive.


late 19th century: from Greek adiabatos 'impassable', from a- 'not' + dia 'through' + batos 'passable' (from bainein 'go'), + -ic.

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