an arrondissement in the department of the Gironde, in France, extending over 604 square miles, and comprehending 7 cantons and 68 communes, with a population of 55,112 persons. The chief place is a market-town of the same name, which in 1851 contained 4,437 inhabitants, employed in various kinds of manufactures, particularly glass. Long. 0. 12. 25. W. Lat. 44. 25. 55. N.