Deep trouble or misery.
An event that brings terrible loss, lasting distress, or severe affliction; a disaster.
A hurricane would be a calamity for this low-lying coastal region.
Dire distress resulting from loss or tragedy.
Any extreme misfortune bringing great loss and sorrow; disaster.
The definition of a calamity is an event that brings loss or a disaster.
An example of a calamity is a tornado.
Origin of calamity
From Middle French calamité, from Latin calamitās (“loss, damage; disaster”), from clāmāre (“to shout, proclaim, declare, cry out”).