What is the meaning of Irreversible?

Incapable of being reversed or turned about or back; incapable of being made to run backwards.

Incapable of being reversed, recalled, repealed, or annulled.

Incapable of being reversed to the original state without consumption of free energy and increase of entropy.

irreversible

definite singular/plural of irreversibel

definite singular/plural of irreversibel

irreversible (not able to be reversed)

Source: wiktionary.org