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Wistfulness vs Undefined - What's the difference?

wistfulness | undefined |

As a noun wistfulness

is the state or characteristic of being wistful.

As an adjective undefined is

lacking a definition or value.

wistfulness

English

Noun

(-)
  • The state or characteristic of being wistful.
  • *{{quote-news
    • , year=2012 , date=May 27 , author=Nathan Rabin , title=TV: Review: THE SIMPSONS (CLASSIC): “New Kid On The Block” (season 4, episode 8; originally aired 11/12/1992) , work=The Onion AV Club citation , page= , passage=It’s a lovely sequence cut too short because the show seems afraid to give itself over to romance and whimsy and wistfulness when it has wedgie jokes to deliver. }}

    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