Meaning

noun an irrational but irresistible motive for a belief or action

noun a mood disorder; an affective disorder in which the victim tends to respond excessively and sometimes violently

originEtymology tree Proto-Indo-European *men- Proto-Indo-European *-yéti Proto-Indo-European *mn̥yétorder. Proto-Hellenic *məňňómai Ancient Greek μαίνομαι (maínomai) Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-i-eh₂ Proto-Hellenic *-íā Ancient Greek -ία (-ía) Ancient Greek μᾰνῐ́ᾱ (mănĭ́ā)der. Latin maniabor. English mania Borrowed from Latin mania, from Ancient Greek μανία…

Etymology from Wiktionary, CC BY-SA 3.0