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Illusive vs Undefined - What's the difference?

illusive | undefined |

As adjectives the difference between illusive and undefined

is that illusive is subject to or pertaining to an illusion , often used in the sense of an unrealistic expectation or an unreachable goal or outcome while undefined is lacking a definition or value.

illusive

English

Adjective

(en adjective)
  • Subject to or pertaining to an illusion , often used in the sense of an unrealistic expectation or an unreachable goal or outcome.
    • Testing software completely is an illusive goal.
  • *
    • he could not catch the illusive thing that had sadly perplexed as well as elevated his spirit.

    Usage notes

    * Often confused with elusive.

    Synonyms

    * (pertaining to an illusion) illusory

    Derived terms

    * illusively * illusiveness

    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