7 Mania Weird mental disorder. Meaning of mania according to wikipedia. http://en.wikipedia.org/wiki/Monomania In 19th century psychiatry, monomania (from Greek monos, one, and mania, mania) is a single pathological preoccupation in an otherwise sound mind.[1] Emotional monomania is that in which the patient is obsessed with only one emotion or several related to it; intellectual monomania is that which is related to only