LAVAUR, an arrondissement of the department of the Tarn, in France, 316 square miles in extent. It consists of five cantons, divided into sixty-one communes, and contains 47,800 inhabitants. The capital is the city of the same name, situated on the left bank of the river Agout. It contains 850 houses, and 6600 inhabitants employed in making silk goods. Long. 1. 47. E. Lat. 43. 42. N.