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Zillion vs Undefined - What's the difference?

zillion | undefined |

As a noun zillion

is (slang|hyperbole) an unspecified large number (of).

As an adjective undefined is

lacking a definition or value.

zillion

English

Noun

(en noun)
  • (slang, hyperbole) An unspecified large number (of).
    • When I want to switch Groupwise domains I am forced to click the cancel button on a login dialog box a zillion times (I’m not exaggerating... much)
  • * 2008 , " Brain tests show child wealth gap", BBC News , 6 December 2008:
    • "We are certainly not blaming lower socioeconomic families for not talking to their kids - there are probably a zillion reasons why that happens."

    Synonyms

    * (unspecified large number) See also .

    Derived terms

    * zillionaire * zillionth

    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