Alais, a city of S. France, department of Gard, on the Gardon, 25 m. N. N. W. of Nimes; pop. in 1866, 19,964. There are numerous iron furnaces, silk mills, and glass works; and coal is mined in the vicinity to the extent of 1,000,000 tons annually. It is a great depot of the raw silk of S. France.