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countable and uncountable, plural manias
Violent derangement of mind; madness; insanity. examples
Excessive or unreasonable desire; insane passion affecting one or many people; fanaticism. quotations examples
One of the manias of the present day, which especially excites my spleen, is the locomotive rage which seems to possess all ranks—that necessity of going out of town in the summer...
1831, L[etitia] E[lizabeth] L[andon], chapter XIX, in Romance and Reality. […], volume I, London: Henry Colburn and Richard Bentley, […], page 233
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.
2013 July 20, “The attack of the MOOCs”, in The Economist, volume 408, number 8845
(psychiatry) The state of abnormally elevated or irritable mood, arousal, and/or energy levels. quotations examples
2004 March, G. E. Berrios, “Of Mania: introduction (Classic text no. 57)”, in History of Psychiatry, number 15, pages 105–124