the capital of Canada, in E Ontario on the Ottawa River: name changed from Bytown to Ottawa in 1854. Pop: 1 325 846 (2015 est)
2.
a river in central Canada, rising in W Quebec and flowing west, then southeast to join the St Lawrence River as its chief tributary at Montreal; forms the border between Quebec and Ontario for most of its length. Length: 1120 km (696 miles)
Ottawa in American English
(ˈɑtəwə)
nounWord forms: plural(for 5)-was or esp collectively -wa
1.
a city in and the capital of Canada, in SE Ontario. 304,462
2.
a river in SE Canada, flowing SE along the boundary between Ontario and Quebec into the St. Lawrence at Montreal. 685 mi. (1105 km) long
3.
a city in NE Illinois, SW of Chicago. 18,166
4.
a town in E Kansas. 11,016
5.
a member of a tribe of Algonquian people of Canada, forced into the Lake Superior and Lake Michigan regions by the Iroquois confederacy