(n)a river in southeastern Canada that flows along the boundary between Quebec and Ontario to the Saint Lawrence River near Montreal, Syn.Ottawa, Ottawa river
The Collaborative International Dictionary of English (GCIDE) v.0.53Collaborative International Dictionary (GCIDE)
n. pl.; sing. Ottawa /sing>. (Ethnol.) A tribe of Indians who, when first known, lived on the Ottawa River. Most of them subsequently migrated to the southwestern shore of Lake Superior. [ 1913 Webster ]