Aqueduct

1. n. A canal or passage; as, the aqueduct of Sylvius, a channel connecting the third and fourth ventricles of the brain.
2. n. A conductor, conduit, or artificial channel for conveying water, especially one for supplying large cities with water.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.