ottawa river n a river in southeastern Canada that flows along the boundary between Quebec and Ontario to the Saint Lawrence River near Montreal Synonym(s) Outaouais Ottawa Ottawa river
News & Articles ottawa river 1 lane of NB I-75 reopens after crash A crash of two tractor-trailer rigs that resulted in a fire on I-75 northbound at Ottawa River Road has led authorities to close parts of I-75 and I-280. June 12, 2013 - The Toledo Blade