n. Clinical depression, characterised by irrational fears, guilt and apathy
the GNU version of the Collaborative International Dictionary of English
n. 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.
The Century Dictionary and Cyclopedia
n. In pathology, a mental condition characterized by great depression combined with a sluggishness and apparent painfulness of mental action.
n. Same as melancholy, 2.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. extreme depression characterized by tearful sadness and irrational fears
Word Usage
"At least since the twelfth century, the term melancholia has been used to identify depressive illness."