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Nightfall vs Undefined - What's the difference?

nightfall | undefined |

As a noun nightfall

is the close of the day; the coming of night.

As an adjective undefined is

lacking a definition or value.

nightfall

English

Noun

  • The close of the day; the coming of night.

    • Synonyms

    * dusk * evening * sundown * sunset

    Derived terms

    * night-falling

    Related terms

    * smokefall

    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