irreversible.
Incapable of being reversed or turned about or back; incapable of being made to run backwards.
Meaning & usage
Incapable of being reversed or turned about or back; incapable of being made to run backwards.
an irreversible engine
Incapable of being reversed, recalled, repealed, or annulled.
an irreversible sentence or decree
Incapable of being reversed to the original state without consumption of free energy and increase of entropy.
Where this word comes from
Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Italic *n̥- Latin in- Latin ir- English ir- English reversible English irreversible From ir- + reversible.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.