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Catacomb vs Undefined - What's the difference?

catacomb | undefined |

As a noun catacomb

is an underground system of tunnels and chambers with recesses for graves, used (in former times) as a cemetery; a subterranean tunnel system used for burying the dead, as in paris or ancient rome.

As an adjective undefined is

lacking a definition or value.

catacomb

English

Noun

(en noun)
  • An underground system of tunnels and chambers with recesses for graves, used (in former times) as a cemetery; a subterranean tunnel system used for burying the dead, as in Paris or ancient Rome.

    • Usage notes

    Often used in the plural.

    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