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Wellspring vs Undefined - What's the difference?

wellspring | undefined |

As a noun wellspring

is the source of water for a stream, spring or well; a fountainhead; a wellhead.

As an adjective undefined is

lacking a definition or value.

wellspring

English

Noun

(en noun)
  • The source of water for a stream, spring or well; a fountainhead; a wellhead.
  • A perennial source of anything; a fountainhead of supply or emanation; resource.

    • 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