Canal

Part of speech: noun (n.)

1. An artificial channel filled with water and designed for navigation, or for irrigating land, etc.

2. A tube or duct; as, the alimentary canal; the semicircular canals of the ear. Canal boat, a boat for use on a canal; esp. one of peculiar shape, carrying freight, and drawn by horses walking on the towpath beside the canal. Canal lock. See Lock.