irreversible

adjective
ir·​re·​vers·​ible | \ ˌir-i-ˈvər-sə-bəl How to pronounce irreversible (audio) \

Definition of irreversible

: not reversible

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Other Words from irreversible

irreversibility \ ˌir-​i-​ˌvər-​sə-​ˈbi-​lə-​tē How to pronounce irreversibility (audio) \ noun
irreversibly \ ˌir-​i-​ˈvər-​sə-​blē How to pronounce irreversibly (audio) \ 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

But the fact that time’s arrow is irreversible, so that hot coffee cools down but never spontaneously heats up, isn’t written into the underlying laws that govern the motion of the molecules in the coffee. Wired, "Fractal Patterns Offer Clues to the Universe's Origin," 11 Aug. 2019 While hanging on to the diplomatic fig leaf of Pyongyang’s permanent, irreversible denuclearization, Mr. Trump appears to have come to terms with North Korea’s nuclear weapons. Michael Auslin, WSJ, "Trump’s Pyongyang Pivot," 26 Feb. 2019 Scientists fear that the Amazon could reach a tipping point where its gradual transformation into something closer to a steppe will be irreversible. Carol Pires, The New Yorker, "The Trump Ally Who Is Allowing the Amazon to Burn," 28 Aug. 2019 Be warned that doing this will break a lot of things and is irreversible. Ron Amadeo, Ars Technica, "The death of “Works with Nest” begins now with Google account migrations," 20 Aug. 2019 By the time the impacts are fully recognized, the change may be irreversible. Anchorage Daily News, "Extreme climate change has arrived in America. Here are the fastest-warming places.," 13 Aug. 2019 But the fact that time’s arrow is irreversible, so that hot coffee cools down but never spontaneously heats up, isn’t written into the underlying laws that govern the motion of the molecules in the coffee. Wired, "Fractal Patterns Offer Clues to the Universe's Origin," 11 Aug. 2019 Assuming globalisation to be irreversible, firms embraced such practices as lean inventory management and just-in-time delivery that pursued efficiency and cost control while making little provision for risk. The Economist, "Global supply chainsSupply chains are undergoing a dramatic transformation," 11 July 2019 Watching the toll of these irreversible changes on the planet can lead to what is known as eco-anxiety: the ongoing worry, fear, and frustration about the future for oneself and for future generations. Samantha Boardman, Marie Claire, "Help! Climate Change Is Stressing Me Out," 8 Aug. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'irreversible.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of irreversible

1630, in the meaning defined above

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More Definitions for irreversible

irreversible

adjective

English Language Learners Definition of irreversible

somewhat formal : impossible to change back to a previous condition or state

irreversible

adjective
ir·​re·​vers·​i·​ble | \ ˌir-i-ˈvər-sə-bəl How to pronounce irreversible (audio) \

Kids Definition of irreversible

: impossible to change back to a previous condition : impossible to reverse irreversible harm

irreversible

adjective
ir·​re·​vers·​ible | \ ˌir-i-ˈvər-sə-bəl How to pronounce irreversible (audio) \

Medical Definition of irreversible

: 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

Other Words from irreversible

irreversibility \ -​ˌvər-​sə-​ˈbil-​ət-​ē How to pronounce irreversibility (audio) \ noun, plural irreversibilities
irreversibly \ -​ˈvər-​sə-​blē How to pronounce irreversibly (audio) \ adverb

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irreversible

adjective
ir·​re·​ver·​si·​ble | \ ˌir-rə-ˈvər-sə-bəl