Source : Webster's Revised Unabridged Dictionary (1913)

Patio \Pa"ti*o\, n.
   In Spain, Spanish America, etc., a court or courtyard of a
   house or other building; esp., an inner court open to the
   sky.

Patio \Pa"ti*o\ (p[aum]"t[-e]*[-o]), n. [Sp., a court] (Metal)
   A paved yard or floor where ores are cleaned and sorted, or
   where ore, salt, mercury, etc., are trampled by horses, to
   effect intermixture and amalgamation.

   Note: The patio process is used to reduce silver ores by
         amalgamation.

Source : WordNet®

patio
     n : usually paved outdoor area adjoining a residence [syn: {terrace}]