Open English Wordnet
Nouns
(n)black bile, melancholya humor that was once believed to be secreted by the kidneys or spleen and to cause sadness and melancholy
Adjectives
(s)melancholy, melancholiccharacterized by or causing or expressing sadness“growing more melancholy every hour”, “her melancholic smile”, “we acquainted him with the melancholy truth”
(s)somber, sombre, melancholygrave or even gloomy in character“a suit of somber black”, “a somber mood”