Pronunciation: (ku-nal'), [key]
—n., v., -nalled or -naled, -nal•ling or -nal•ing.
1. an artificial waterway for navigation, irrigation, etc.
2. a long narrow arm of the sea penetrating far inland.
3. a tubular passage or cavity for food, air, etc., esp. in an animal or plant; a duct.
4. channel; watercourse.
5. Astron.one of the long, narrow, dark lines on the surface of the planet Mars, as seen telescopically from the earth.
to make a canal through.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.