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Foothold vs Undefined - What's the difference?

foothold | undefined |

As a noun foothold

is (climbing) a solid grip with the feet.

As an adjective undefined is

lacking a definition or value.

foothold

English

Noun

(en noun)
  • (climbing) A solid grip with the feet.
  • (military) airhead, beachhead, bridgehead, lodgement.
    • English words with consonant pseudo-digraphs

    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