aqueducts1) N-COUNT An aqueduct is a long bridge with many arches, which carries a water supply or a canal over a valley.
...an old Roman aqueduct.2) N-COUNT An aqueduct is a large pipe or canal which carries a water supply to a city or a farming area.
...a nationwide system of aqueducts to carry water to the arid parts of this country.
English dictionary. 2008.