DEFINITION
noun1 an artificial waterway constructed to allow the passage of boats or ships inland or to convey water for irrigation.2 a tubular duct in a plant or animal, serving to convey or contain food, liquid, or air: the ear canal.3 Astronomy any of a number of linear markings formerly reported as seen by telescope on the planet Mars.
ORIGIN late Middle English: from Old French, alteration of chanel ‘channel’, from Latin canalis ‘pipe, groove, channel’, from canna ‘cane’.
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