MENIN (Flemish Meenen), a town of Belgium in the province of West Flanders situated on the Lys 7 m. S. of Courtrai. Pop. (1904), 19,377. It manufactures linen and flannel, and in the neighbourhood are extensive tobacco plantations. It was first fortified in 1578, and in 1685 Vauban made it one of the strongest places on the French frontier, but the fortifications were razed in 1748 by the treaty of Aix-la-Chapelle.