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Definition of Hyperthymia
1. Noun. A personality type characterized by an excessively positive disposition similar to, but more stable than, the hypomania of bipolar disorder. ¹
¹ Source: wiktionary.com
Medical Definition of Hyperthymia
1. State of overactivity, greater than average and less than the overactivity of the manic state of manic-depressive disorder. Origin: hyper-+ G. Thymos, soul, thought (05 Mar 2000)