melancholy -- (a constitutional tendency to be gloomy and depressed)
black bile, melancholy -- (a humor that was once believed to be secreted by the kidneys or spleen and to cause sadness and melancholy)
Overview of adj melancholy
The adj melancholy has 2 senses
melancholy, melancholic -- (characterized by or causing or expressing sadness; "growing more melancholy every hour"; "her melancholic smile"; "we acquainted him with the melancholy truth")
somber, sombre, melancholy -- (grave or even gloomy in character; "solemn and mournful music"; "a suit of somber black"; "a somber mood")