dalles (dālz) pl.n. The rapids of a river that runs between the steep precipices of a gorge or narrow valley.
[French, pl. of dalle, gutter, from Old French, from Old Norse dæla.]
Dalles (dālz) A city of northern Oregon on the Columbia River east of Portland. An important stop on the Oregon Trail in the 1800s, it is now a busy inland port. Population: 12,100.