Wikipedia:

Canal | Canals

Summary:

human-made channels for water. There are two types of canal: Aqueducts: water supply canals that are used for the conveyance and delivery of potable water for human consumption, municipal uses, and agriculture irrigation. Rills and Acequias are small ...  (38 of 3532 words, 14 images)

Link:

http://en.wikipedia.org/wiki/Canal  [cite]

Columbia:

canal

Summary:

an artificial waterway constructed for navigation or for the movement of water. The digging of canals for irrigation probably dates back to the ...  (23 of 557 words)

Link:

http://www.infoplease.com/ce6/sci/A0810139.html  [cite]

Wikipedia:

Canal (disambiguation)

Summary:

usually refers to a human-made waterway that connects existing natural bodies of water. For specific canals, refer to the lists of canals. The word canal may also refer to: Canal Flats, British Columbia, Canada | Canal Township, Venango County, ...  (38 of 231 words, 18 senses)

Link:

http://en.wikipedia.org/wiki/Canal (disambiguation)  [cite]

Encarta:

canal | canals [plural]

Summary:

an artificial waterway constructed for use by shipping, for irrigation, or for recreational use. A canal may take in parts of natural rivers along its ...  (25 of 107 words, 3 senses, 1 etymology, pronunciation)

Link:

http://encarta.msn.com/dictionary 1861594387/definition.html  [cite]

Britannica:

canals and inland waterways

Summary:

Artificial waterway built for transportation, irrigation, water supply, or drainage. The early Middle Eastern civilizations probably first built ...  (18 of 102 words)

Link:

http://www.britannica.com/EBchecked/topic/92049/canal  [cite]

Wiktionary:

canal | canals [plural] | canaled [past tense] | canalled [past tense] | canaling [present participle] | canalling [present participle]

Summary:

An artificial waterway, often connecting one body of water with another | A tubular channel within the body. | To dig an artificial waterway in or to (a place), especially for drainage | To travel along a canal by boat  (37 of 82 words, 4 senses, 1 image, 1 etymology)

Link:

http://en.wiktionary.org/wiki/canal  [cite]

Random House:

canal | canalled [past tense] | canaled [past tense] | canalling [present participle] | canaling [present participle] | klong [Thailand]

Summary:

an artificial waterway for navigation, irrigation, etc. | a long narrow arm of the sea penetrating far inland. | a tubular passage or cavity for food, ...  (24 of 80 words, 6 senses, pronunciation)

Link:

http://dictionary.infoplease.com/canal  [cite]

Merriam-Webster:

canal

Summary:

a tubular anatomical passage or channel; "duct" | "channel", "watercourse" | an artificial waterway for navigation or for draining or irrigating land ...  (20 of 75 words, 4 senses, 1 etymology, pronunciation)

Link:

http://www.merriam-webster.com/dictionary/canal  [cite]