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Impassive vs Undefined - What's the difference?

impassive | undefined |

As adjectives the difference between impassive and undefined

is that impassive is having, or revealing, no emotion while undefined is lacking a definition or value.

impassive

English

Adjective

(en adjective)
  • Having, or revealing, no emotion.
  • Still or motionless.

    • Synonyms

    * apathetic, phlegmatic

    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