Irreversible meaning

ĭr'ĭ-vûr'sə-bəl
The definition of irreversible is something that cannot be altered, changed or undone.

Having your tonsils permanently removed is an example of an irreversible operation.

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Impossible to reverse.

An irreversible momentum toward open revolution.

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Not reversible.
  • That cannot be repealed, annulled, or undone.
  • That cannot be turned inside out, run backward, etc.
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Incapable of being reversed or turned about or back; incapable of being made to run backward.

An irreversible engine.

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Incapable of being reversed, recalled, repealed, or annulled.

An irreversible sentence or decree.

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(thermodynamics) Incapable of being reversed to the original state without consumption of free energy and increase of entropy.
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Origin of irreversible

ir- +‎ reversible

Sentence Examples

  • In any spontaneous irreversible change, if the system is heat-isolated, there must be an increase of entropy.

  • A common illustration of an irreversible process is the expansion of a gas into a vacuum or against a pressure less than its own.

  • An irreversible process which permits a more complete experimental investigation is the steady flow of a fluid in a tube already referred to in section to.

  • (5) If we might also regard the couple as a reversible thermodynamic engine for converting heat into work, and might neglect irreversible effects, such as conduction, which are independent of the current, we should expect to find the ratio of the heat absorbed at the hot junction to the heat evolved at the cold junction, namely, PIP', to be the same as the ratio T/T of the absolute temperatures of the junctions.

  • But apart from the fact that the authority of the Privy Council, as not being a "spiritual" court, is denied by many of the clergy, no one claims that its decisions are irreversible in the light of fresh evidence.

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Words near irreversible in the Dictionary