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Reactiveness vs Undefined - What's the difference?

reactiveness | undefined |

As a noun reactiveness

is the quality or state of being reactive.

As an adjective undefined is

lacking a definition or value.

reactiveness

English

Noun

(-)
  • The quality or state of being reactive.

    • Synonyms

    * reactivity

    External links

    * *

    Anagrams

    *

    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