an arrondissement in the department of Vaucluse, in France, 356 square miles in extent. It is divided into five cantons and twenty-nine communes, containing 43,282 inhabitants. The city which gives name to the arrondissement is situated on a fruitful plain on the banks of the Auzon. It contains 2500 houses and 9674 inhabitants. It is a place of considerable trade, both in the productions of its vicinity, and in cotton and silk goods. It contains an ancient cathedral and an episcopal palace, which are remarkable edifices. Long. 4° 58' 48" E. Lat. 44° 3' 33" N.