Cal·ga·ry (kāl'gə-rē) The largest city of Alberta, Canada, in the southern part south of Edmonton. Site of the annual Calgary Stampede, a famous rodeo dating from 1912, it is the largest city in the province and the center of Canada's petroleum industry. The 1988 Winter Olympics were held here. Population: 988,000. Cal·gar'i·an (-gâr'ē-ən, -gār'-) n.