Definition of adiabatic in English:

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Pronunciation: /ˌeɪdʌɪəˈbatɪk/
Pronunciation: /ˌadɪəˈbatɪk/


1Relating to or denoting a process or condition in which heat does not enter or leave the system concerned: the adiabatic expansion of a perfect gas
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.


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



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.

For editors and proofreaders

Line breaks: adia|bat¦ic

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