The quality or condition of being insane. See Synonyms at insanity.(noun)
Great folly: It was sheer madness to attempt the drive during a blizzard. (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.
Use "madness" in a sentence
"III. ii.439 (293,5) [to a living humour of madness] If this be the true reading we must by _living_ understand _lasting_, or _permanent_, but I cannot forbear to think that some antithesis was intended which is now lost; perhaps the passage stood thus, _I drove my suitor from a_ dying _humour of love to a living humour of madness_."
"The whole thing - coupled with the normal end of the term madness - makes me want to jump in the car and drive until I hit a major metropolitan area that has luxurious hotels and fabulous restaurants."
"He not only suffered a spectacular bout of what he called madness but also wrote an extraordinarily vivid account of it in his short novel The Ordeal of Gilbert Pinfold, which he freely admitted was a thinly disguised account of what had happened to him on a 1954 voyage to Ceylon to restore his health."