what does aqueduct mean
1 Aqueduct (bridge) , a bridge that is constructed to convey water over an obstacle, such as a ravine or valley.2  Navigable aqueduct (or water bridge), a water-filled bridge enabling boats, barges or ships on a waterway to cross over an obstacle, such as a ravine or valley. Aqueduct (water supply) , an artificial (man-made) channel that is constructed to convey water from one location to another. 2  This can be made of canals, pipelines, inverted siphons, reservoirs and tunnels. 3  Roman aqueduct, water supply systems constructed during the Roman Empire.