Having a feeling of pensive sadness, typically with no obvious cause. She had a melancholy expression on her face as she gazed out the window.
Causing or expressing sadness or sorrow. A melancholy melody drifted through the empty hall.
(archaic, medicine) Relating to or caused by black bile, one of the four bodily humours once believed to influence temperament. In medieval texts, a melancholy temperament was linked to an excess of cold, dry black bile.