Saskatchewan Syllabification: (Sas·katch·e·wan)Pronunciation: /səˈskaCHəwən, -əˌwän/Definition of Saskatchewan 1a province in central Canada; population 968,157 (2006); capital, Regina. 2a river in Canada. Rising in two headstreams in the Rocky Mountains, it flows east for 370 miles (596 km) to Lake Winnipeg. Saskatchewan in other Oxford dictionaries Definition of Saskatchewan in the British & World English dictionary