an arrondissement of the department of the North, in France, extending over 275 square miles, divided into seven cantons, and those into fifty-three communes, with 100,936 inhabitants. The capital is the city of the same name. It is situated on the river Borre, and on a canal. It is an ill-built place, with 961 houses and 7354 inhabitants, who carry on manufactures of linen, twine, sail-cloth, lace, and cottons, and also refineries of salt, and make snuff and starch. Long. 2° 27'. E. Lat. 50° 44'. N.