Source : Webster's Revised Unabridged Dictionary (1913)

Buggy \Bug"gy\, n.; pl. {Buggies}.
   1. A light one horse two-wheeled vehicle. [Eng.]

            Villebeck prevailed upon Flora to drive with him to
            the race in a buggy.                  --Beaconsfield.

   2. A light, four-wheeled vehicle, usually with one seat, and
      with or without a calash top. [U.S.]

   {Buggy cultivator}, a cultivator with a seat for the driver.
      

   {Buggy plow}, a plow, or set of plows, having a seat for the
      driver; -- called also {sulky plow}.