meeleoluseisund, millele on omane mh. alaväärtustunne, algatusvõime puudus, väsimus ja unehäired, kurvameelsus, masendus, meeleolulangus nukrus- ja alaväärsustundega, mõtlemist ja tegutsemist pidurdav püsiv psüühiline häire, (a disorder characterized by) the presence of a sad, empty or irritable mood, accompanied by somatic and cognitive changes that significantly affect the individual's capacity to function, a mental state of altered mood characterized by feelings of sadness, despair, and discouragement; distinguished from grief, which is realistic and proportionate to a personal loss