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Fen vs Undefined - What's the difference?

fen | undefined |

As an adjective undefined is

lacking a definition or value.

fen

English

(wikipedia fen)

Etymology 1

From (etyl) (m), from (etyl) ).

Noun

(en noun)
  • a type of wetland fed by ground water and runoff, containing peat below the waterline
  • * 1842 ,
    • In dark fens of the Dismal Swamp / The hunted Negro lay; [...]
    Derived terms
    * fenlike * fennish

    See also

    * bog * everglade * marsh * swamp * wetland

    Etymology 2

    From (fan), by analogy with (men) as the plural of (man).

    Noun

    fen' (p) (''singular:'' ' fan )
  • a plural form of fan used by enthusiasts of science fiction, fantasy, and anime, partly from whimsy and partly to distinguish themselves from fans of sport, etc.
  • * 1951 , Winthrop Sargeant, Through the Interstellar Looking Glass'' (in ''Life magazine, 21 May 1951)
    • Sad to relate, however, some of the European delegates were probably insurgents rather than true fen .

    Coordinate terms

    * fenne

    Derived terms

    * actifen * confen * eofen * fakefen * femme fen * femfen * femmefen * fringefen * litfen * mediafen * neofen * passifen * stfen * trufan * zinefen ----

    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