adj ·Moderate ·College level

Definitions

Adjective

1. 1
   Incapable of being reversed or turned about or back; incapable of being made to run backwards. not-comparable

   "an irreversible engine"

2. 2
   Incapable of being reversed, recalled, repealed, or annulled. not-comparable

   "an irreversible sentence or decree"

3. 3
   Incapable of being reversed to the original state without consumption of free energy and increase of entropy. not-comparable

Adjective

1. 1
   incapable of being reversed wordnet

Synonyms

All synonyms

permanentbeyond recallbeyond remedychangelesschronicconfirmed

Antonyms

All antonyms

reversible

Example

More examples

"The death penalty is final and irreversible."

Etymology

From ir- + reversible.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.