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Allusion vs Undefined - What's the difference?

allusion | undefined |

As a noun allusion

is allusion.

As an adjective undefined is

lacking a definition or value.

allusion

English

(wikipedia allusion)

Noun

(en noun)
  • An indirect reference; a hint; a reference to something supposed to be known, but not explicitly mentioned; a covert indication.

    • 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