'Melancholia' definitions:

Definition of 'melancholia'

From: WordNet
noun
Extreme depression characterized by tearful sadness and irrational fears

Definition of 'Melancholia'

From: GCIDE
  • Melancholia \Mel`an*cho"li*a\, n. [L. See Melancholy.] (Med.) A kind of mental unsoundness characterized by extreme depression of spirits, ill-grounded fears, delusions, and brooding over one particular subject or train of ideas. [1913 Webster]

Synonyms of 'melancholia'

From: Moby Thesaurus