canal

American  

[kuh-nal] / kəˈnæl /

noun

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., especially in an animal or plant; a duct.

4. channel; watercourse.

5. Astronomy. one of the long, narrow, dark lines on the surface of the planet Mars, as seen telescopically from the earth.

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verb (used with object)

canalled, canaled, canalling, canaling

1. to make a canal through.

canal British  

/ kəˈnæl /

noun

1. an artificial waterway constructed for navigation, irrigation, water power, etc

2. any of various tubular passages or ducts

   the alimentary canal

3. any of various elongated intercellular spaces in plants

4. astronomy any of the indistinct surface features of Mars originally thought to be a network of channels but not seen on close-range photographs. They are caused by an optical illusion in which faint geological features appear to have a geometric structure

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verb

1. to dig a canal through

2. to provide with a canal or canals

Etymology

Origin of canal

First recorded in 1400–50; late Middle English: “waterpipe, tubular passage,” from Latin canālis, perhaps equivalent to can(na) “reed, pipe” ( cane ) + -ālis -al ¹; canal def. 5 a mistranslation of Italian canali “channels,” the term used by G. V. Schiaparelli

Explanation

A canal is a long, man-made strip of water used for irrigation or boat access to a bigger body of water, like the famous Erie Canal, which connects the Hudson River to Lake Erie. Canal is related to the word channel, and all its different shades of meaning have to do with tunnel shaped spaces that carry liquid from one place to another. Besides man-made irrigation canals, canals that connect boat docks to rivers and oceans, or street-like canals in boat cities like Amsterdam, there are canals in your body, like your nasal canal, or the birth canal you came out of. It's also a verb meaning "to dig a canal."

Example Sentences

A short walk along an irrigation canal leads to a weathered observation deck rising two stories above a patchwork of saturated flats where saltgrass, iodine bush and cattail take root.

From Los Angeles Times • Apr. 7, 2026

It was created by a break in a canal carrying water from the Colorado River in the early 1900s.

From Los Angeles Times • Apr. 3, 2026

Some patients are given a choice: have the tooth removed on the NHS or have specialist root canal work to save it, but only if they are prepared to go private, she says.

From BBC • Mar. 24, 2026

The researchers found several encouraging changes in patients after successful root canal treatment.

From Science Daily • Mar. 15, 2026

I didn’t like the green canal between the dock and the Clara Belle, but I quit looking down and planted my foot on the side of the boat.

From "The Line Tender" by Kate Allen