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Irrevocable vs Undefined - What's the difference?

irrevocable | undefined |

As an adverb irrevocable

is irrevocable (not able to be revoked).

As an adjective undefined is

lacking a definition or value.

irrevocable

English

Adjective

(-)
  • Unable to be retracted or reversed; final.
  • * , As You Like It act 1, sc. 3:
    • Firm and irrevocable is my doom
    Which I have pass'd upon her; she is banish'd.
  • * 1848 , , Dombey and Son , ch. 61:
    • On each face, wonder and fear were painted vividly; each so still and silent, looking at the other over the black gulf of the irrevocable past.
  • * 2005 April 28, , " Cycling: Cipo retires. Definitely. Absolutely. Yes. Probably," New York Times (retrieved 27 April 2014):
    • Once again, Mario Cipollini has announced his definite, absolute, unswerving and irrevocable decision to retire, and this time he means it. Probably.

    undefined

    English

    Adjective

    (wikipedia undefined) (-)
  • Lacking a definition or value.
  • (mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.
    • The result of division by zero is undefined .

    Antonyms

    * defined