Source : Webster's Revised Unabridged Dictionary (1913)

Calash \Ca*lash"\, n. [F. cal[`e]che; of Slavonic origin; cf.
   Bohem. kolesa, Russ. koliaska calash, koleso, kolo, wheel.]
   1. A light carriage with low wheels, having a top or hood
      that can be raised or lowered, seats for inside, a
      separate seat for the driver, and often a movable front,
      so that it can be used as either an open or a close
      carriage.

            The baroness in a calash capable of holding herself,
            her two children, and her servants.   --W. Irving.

   2. In Canada, a two-wheeled, one-seated vehicle, with a
      calash top, and the driver's seat elevated in front.

   3. A hood or top of a carriage which can be thrown back at
      pleasure.

   4. A hood, formerly worn by ladies, which could be drawn
      forward or thrown back like the top of a carriage.

Source : WordNet®

calash
     n 1: a woman's large folded hooped hood; worn in the 18th century
          [syn: {caleche}]
     2: the folding hood of a horse-drawn carriage [syn: {caleche},
        {calash top}]