irreversible

adjective

ir·​re·​vers·​ible ˌir-i-ˈvər-sə-bəl How to pronounce irreversible (audio)
: not reversible
irreversibility noun
irreversibly adverb

Examples of irreversible in a Sentence

He suffered an irreversible loss of vision. The crisis has done irreversible harm to the countries' relations.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The reaction also had to be irreversible to prevent ongoing cycles of reactions between the lithium and the remains of the chemical that brought it there. John Timmer, Ars Technica, 21 Feb. 2025 After four years of age, the limited functional retinal tissue degenerates, leading to total and irreversible blindness. Tom Rogers, Newsweek, 21 Feb. 2025 The question for the league – and media companies – is if Gen Alpha’s trend away from watching full games is irreversible or simply a product of age. Alex Sherman, CNBC, 20 Feb. 2025 The imprint Robinson has left on the sneaker market is irreversible. Robyn Mowatt, Essence, 18 Feb. 2025 See All Example Sentences for irreversible

Word History

First Known Use

1630, in the meaning defined above

Time Traveler
The first known use of irreversible was in 1630

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Cite this Entry

“Irreversible.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/irreversible. Accessed 1 Mar. 2025.

Kids Definition

irreversible

adjective
ir·​re·​vers·​ible ˌir-i-ˈvər-sə-bəl How to pronounce irreversible (audio)
: impossible to reverse
an irreversible chemical reaction
irreversible damage
irreversibility noun
irreversibly adverb

Medical Definition

irreversible

adjective
ir·​re·​vers·​ible ˌir-i-ˈvər-sə-bəl How to pronounce irreversible (audio)
: incapable of being reversed : not reversible
an irreversible medical procedure
: as
a
: impossible to make run or take place backward
irreversible chemical syntheses
b
of a colloid : incapable of undergoing transformation from sol to gel or vice versa
c
of a pathological process : of such severity that recovery is impossible
irreversible brain damage
irreversibility noun
plural irreversibilities
irreversibly adverb

Legal Definition

irreversible

adjective
ir·​re·​ver·​si·​ble ˌir-rə-ˈvər-sə-bəl How to pronounce irreversible (audio)
: not reversible
an irreversible decision

More from Merriam-Webster on irreversible

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