Definition of "mania" []

• An excessively intense enthusiasm, interest, or desire; a craze: a mania for neatness. (noun)
• Psychiatry A manifestation of bipolar disorder, characterized by profuse and rapidly changing ideas, exaggerated sexuality, gaiety, or irritability, and decreased sleep. (noun)
• Violent abnormal behavior. See Synonyms at insanity. (noun)
• A mental disorder characterized by great excitement and occasionally violent behaviour (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• An obsessional enthusiasm or partiality (noun)

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• "List mania is at its highest before holiday seasons: summer and winter."
• "Lots of "Avatar" mania is incoming starting tomorrow, so lock your browsers on MTV. com if you want to keep up with the latest."
• "While no doubt the abrupt fall has caught some traders with big losses, the bigger danger is a long-term mania that leads to a far bigger misallocation of capital."