melancholia Meaning, Definition & Usage

  1. noun extreme depression characterized by tearful sadness and irrational fears

WordNet

Mel`an*cho"li*a noun
Etymology
L. See Melancholy.
Definitions
  1. (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.

Webster 1913