An artificial channel filled with water and designed for navigation, or for irrigating land, etc.
- An artificial waterway or artificially improved river used for travel, shipping, or irrigation.
- Anatomy A tube, duct, or passageway.
- Astronomy One of the faint, hazy markings resembling straight lines on early telescopic images of the surface of Mars.
- To dig an artificial waterway through: canal an isthmus.
- To provide with an artificial waterway or waterways.