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Replacement vs Undefined - What's the difference?

replacement | undefined |

As a noun replacement

is a person or thing that takes the place of another; a substitute.

As an adjective undefined is

lacking a definition or value.

replacement

English

Noun

(en noun)
  • A person or thing that takes the place of another; a substitute.
  • * {{quote-news
    • , year=2010 , date=December 28 , author=Kevin Darlin , title=West Brom 1 - 3 Blackburn , work=BBC citation , page= , passage=Rovers lost keeper Robinson to a calf problem at half-time and his replacement Mark Bunn, making his Premier League debut, was immediately called into action - pushing away a vicious Peter Odemwingie drive at the near post.}}
  • The act of replacing something.

    • Synonyms

    * See also

    Derived terms

    * overreplacement * subreplacement
    See also
    * spare part

    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