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Apparition vs Undefined - What's the difference?

apparition | undefined |

As a noun apparition

is an act of becoming visible; appearance; visibility.

As an adjective undefined is

lacking a definition or value.

apparition

English

Noun

(en noun)
  • An act of becoming visible; appearance; visibility.
    • The sudden apparition of the Spaniards. – .
    The apparition of Lawyer Clippurse occasioned much speculation in that portion of the world. – .
  • The thing appearing; a visible object; a form.
    • Which apparition , it seems, was you. – Tatler.
  • An unexpected, wonderful, or preternatural appearance; especially something such as a ghost or phantom.
    • The heavenly bands . . . a glorious apparition. – .
    I think it is the weakness of mine eyes That shapes this monstrous apparition . –
  • (astronomy) The first appearance of a star or other luminary after having been invisible or obscured;—opposed to occultation.

    • Synonyms

    * (act of becoming visible) appearance * (a preternatural appearance) vision * See also

    Related terms

    * apparent * appearance

    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