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Doubtful vs Undefined - What's the difference?

doubtful | undefined |

As adjectives the difference between doubtful and undefined

is that doubtful is subject to, or causing doubt while undefined is lacking a definition or value.

doubtful

English

Alternative forms

* doubtfull (archaic)

Adjective

(en adjective)
  • Subject to, or causing doubt
  • or showing doubt, sceptical
  • Undecided or of uncertain outcome
  • (obsolete) Fearsome, dreadful.
  • *, Bk.XIV, Ch.vii:
  • *:‘With whom,’ seyde Sir Percivale, ‘shall I fyght?’ ‘With the moste douteful champion of the worlde.’
  • Improbable or unlikely
  • Suspicious, or of dubious character
  • Unclear or unreliable
  • *{{quote-book, year=1922, author=E.R. Eddison, title=The Worm Ouroboros
    • , passage=The pupils of her great eyes were large in the doubtful lamplight, swallowing their green fires in deep pools of mystery and darkness.}}

    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