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Rehydration vs Undefined - What's the difference?

rehydration | undefined |

As a noun rehydration

is the replenishment of water and electrolytes lost through dehydration.

As an adjective undefined is

lacking a definition or value.

rehydration

English

Noun

(en-noun) (wikipedia rehydration)
  • The replenishment of water and electrolytes lost through dehydration.

    • 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