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Mania vs Undefined - What's the difference?

mania | undefined |

As a proper noun mania

is (roman mythology) the goddess of the dead and ghosts.

As an adjective undefined is

lacking a definition or value.

mania

English

(wikipedia mania)

Noun

(en noun)
  • Violent derangement of mind; madness; insanity.
  • Excessive or unreasonable desire; insane passion affecting one or many people; fanaticism.
  • * {{quote-magazine, date=2013-07-20, volume=408, issue=8845, magazine=(The Economist)
    • , title= The attack of the MOOCs , passage=Dotcom mania was slow in coming to higher education, but now it has the venerable industry firmly in its grip. Since the launch early last year of Udacity and Coursera, two Silicon Valley start-ups offering free education through MOOCs, massive open online courses, the ivory towers of academia have been shaken to their foundations.}}
  • (psychiatry) The state of abnormally elevated or irritable mood, arousal, and/or energy levels.

    • Related terms

    * manic * maniac * megalomania

    Anagrams

    * ----

    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