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A river, about 1,270 km (780 mi) long, rising in the Canadian Shield of southwest Quebec, Canada, and flowing west and southeast in a V-shaped course to the St. Lawrence River near Montreal. It was an important waterway for early fur traders and missionaries.
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|Noun||1.||Ottawa river - a river in southeastern Canada that flows along the boundary between Quebec and Ontario to the Saint Lawrence River near Montreal|
Canada - a nation in northern North America; the French were the first Europeans to settle in mainland Canada; "the border between the United States and Canada is the longest unguarded border in the world"