an arrondissement in the department of the Orne, in France. It is 510 square miles in extent, and is divided into seven cantons, which are subdivided into a hundred communes, containing a population of 117,093 persons. The chief place, a city of the same name, is situated on the river Varenne, and contains 358 houses and 2244 inhabitants. Long. 0. 57. W. Lat. 48. 54. N.