AVILA, a town of Spain, in the province of Old Castile. It is situated on the banks of the river Adaja, which running towards the north and joining the Arcevalillo, empties itself into the Duero. The town is situated on a plain, and the fields around it are highly productive in fruits and grain. It is the seat of a bishop, and has one cathedral, eight parish churches, sixteen monasteries, five hospitals, 1000 houses, and 4200 inhabitants. Long. 4. 59. W. Lat. 40. 48. N.