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Refresher vs Undefined - What's the difference?

refresher | undefined |

As a noun refresher

is something that refreshes.

As an adjective undefined is

lacking a definition or value.

refresher

English

Noun

(en noun)
  • Something that refreshes.
  • :The nap was a welcome refresher .
  • A review to refresh or renew knowledge.
  • :They recommend a refresher class every few years.

    • 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