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Astronaut vs Undefined - What's the difference?

astronaut | undefined |

As a noun astronaut

is astronaut.

As an adjective undefined is

lacking a definition or value.

astronaut

English

(wikipedia astronaut)

Noun

(en noun)
  • A member of the crew of a spaceship or other spacecraft that travels beyond Earth's atmosphere, or someone trained to serve that purpose

    • Synonyms

    * cosmonaut * spationaut * taikonaut

    Derived terms

    * ancient astronaut

    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