SEYNE SUR MER, or La Seyne, an industrial suburb of Toulon, S.W. of that port, and connected with it by rail and steamer. Pop. (1901) 21,002. It owes its importance to the shipbuilding trade, the Société des Forges et Chantiers de la Méditerranée having here one of the finest shipbuilding yards in Europe (it is a branch of the greater establishment at Marseilles), which gives employment to about 3000 workmen.