Source : Webster's Revised Unabridged Dictionary (1913)

Calamitous \Ca*lam"i*tous\, a. [L. Calamitosus; cf. F.
   calamiteux.]
   1. Suffering calamity; wretched; miserable. [Obs.]

            Ten thousands of calamitous persons.  --South.

   2. Producing, or attended with distress and misery; making
      wretched; wretched; unhappy. ``This sad and calamitous
      condition.'' --South. ``A calamitous prison'' --Milton.

   Syn: Miserable; deplorable; distressful; afflictive;
        wretched; grievous; baleful; disastrous; adverse;
        unhappy; severe; sad; unfortunate. --
        {Ca*lam"i*tous*ly}, adv. -- {Ca*lam"i*tous*ness}, n.