Longman Dictionary of Contemporary English homepage


1 irreversible damage, change etc is so serious or so great that you cannot change something back to how it was before [≠ reversible]
Fossil fuels have caused irreversible damage to the environment.
2 if an illness or bad physical condition is irreversible, it will continue to exist and cannot be cured:
Miller is in an irreversible coma.
irreversible blindness
irreversibly adverb:
His reputation was irreversibly damaged by the affair.

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary