noun
any process in which a system can be made to pass through the same states in the reverse order when the process is reversed
• Ant: ↑irreversible process
• Hypernyms: ↑process, ↑physical process
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noun : an ideal process or series of changes of a system which is in complete equilibrium at each stage such that when the process is reversed each of the changes both internal and external is reversed but with the amount of transferred energy unaltered
Useful english dictionary. 2012.