Irreversible
WordNet
adjective
(1) Incapable of being reversed
"Irreversible momentum toward revolution"
WiktionaryText
Adjective
- Incapable of being reversed or turned about or back; incapable of being made to run backward; as, an irreversible engine.
- Incapable of being reversed, recalled, repealed, or annulled; as, an irreversible sentence or decree.
- Incapable of being reversed to the original state without consumption of free energy and increase of entropy.