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Unsuccessful vs Undefined - What's the difference?

unsuccessful | undefined |

As adjectives the difference between unsuccessful and undefined

is that unsuccessful is failed, not successful while undefined is lacking a definition or value.

unsuccessful

English

Adjective

(en adjective)
  • Failed, not successful.
    • His unsuccessful attempt earned him sympathy, condolences...and an occasional good-natured ribbing.

    Antonyms

    * successful

    Derived terms

    * unsuccessfully * unsuccessfulness

    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