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Boulogne-Billancourt(bo͞olô`nyə-bēyäNko͞or`), city (1990 pop. 101,971), Hauts-de-Seine dept., N central France, a suburb SW of Paris. One of the largest automobile factories in France is in the city. Other manufactures include airplanes, electrical goods, chemicals, bicycles, and processed foods. Part of the city is residential, with elegant homes bordering on the Bois de BoulogneBois de Boulogne
, park in Paris, France, bordering on the western suburb of Neuilly-sur-Seine. A favorite pleasure ground since the 17th cent., the park contains the race courses of Auteuil and Longchamps and many delightful promenades and bridle paths.
..... Click the link for more information. . There is a 14th-century Gothic cathedral.
an industrial suburb of SW Paris. Pop.: 106 367 (1999)