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Shellfish vs Undefined - What's the difference?

shellfish | undefined |

As a noun shellfish

is an aquatic invertebrate, such as a mollusc or crustacean, that has a shell, especially as food.

As an adjective undefined is

lacking a definition or value.

shellfish

English

Noun

  • An aquatic invertebrate, such as a mollusc or crustacean, that has a shell, especially as food.

    • External links

    * (wikipedia "shellfish")

    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