late 14c., "with or caused by black bile; sullen, gloomy, sad," from melancholy (n.); sense of "deplorable" (of a fact or state of things) is from 1710.

c. 1300, "condition characterized by sullenness, gloom, irritability," from Old French melancolie "black bile, ill disposition, anger, annoyance" (13c.), from Late Latin melancholi [..]

To dream that you feel melancholy over any event, is a sign of disappointment in what was thought to be favorable undertakings. To dream that you see others melancholy, denotes unpleasant interruption in affairs. To lovers, it brings separation.   

pensiveness; quietly serious thoughtfulness, sadness, or longing.

(n) a feeling of thoughtful sadness(n) a constitutional tendency to be gloomy and depressed(n) a humor that was once believed to be secreted by the kidneys or spleen and to cause sadness and melanchol [..]

Affected with great sadness or depression. (Melancholy people don't talk much.) *en|wistful, en|melancholic * See also