St. Thomas, city and capital of Elgin county, Ontario, Canada; on Kettle creek and the Grand Trunk and other railroads; 17 miles S. of London; contains repair shops of the Michigan Central railroad and manufactories of car wheels, farm implements, fiber ware, and bent-wood, and is the seat of Alma Ladies' College, Collegiate Institute, Amasa Wood Hospital, Sinclair College, and Williams Home for the Aged.