The federal capital of Canada, in south-eastern Ontario, on the Ottawa River (a tributary of the St Lawrence River); population 812,129 (2006). From its founding in 1827 until 1854, it was named Bytown after Colonel John By (1779–1836).
Definition of Ottawa in US English:
Ottawa
proper nounˈɑdəwəˈädəwə
The federal capital of Canada, in southeastern Ontario, on the Ottawa River (a tributary of the St. Lawrence River); population 812,129 (2006). From its founding in 1827 until 1854, it was named Bytown after Colonel John By (1779–1836).