An artificial waterway or artificially improved river used for travel, shipping, or irrigation.
A tubular channel within the body.
One of the faint, hazy markings resembling straight lines on early telescopic images of the surface of Mars.
To dig an artificial waterway in or to (a place), especially for drainage
To travel along a canal by boat
An extent of land where water from rain or snow melt drains downhill into a river or series of rivers.