Etymology
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Ottawa

Canadian capital, founded 1827 as Bytown, named for English officer John By, who oversaw construction of the canal there; renamed 1854, when it became capital, for the Ottawa River, which took its name from the Algonquian people who lived in Michigan and Ontario. Their name is said to be from adawe "to trade."

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Definitions of Ottawa

Ottawa (n.)
a member of the Algonquian people of southern Ontario;
Ottawa (n.)
a river in southeastern Canada that flows along the boundary between Quebec and Ontario to the Saint Lawrence River near Montreal;
Synonyms: Outaouais / Ottawa river
Ottawa (n.)
the capital of Canada (located in southeastern Ontario across the Ottawa river from Quebec);
Synonyms: Canadian capital / capital of Canada
From wordnet.princeton.edu