RhymeZone: dalles definitions

Definitions of Dall:

name: A surname (common: 1 in 100000 families; popularity rank in the U.S.: #14659)

noun: (plural only) The rapids in a deep, narrow stream confined between the rock walls of a canyon or gorge.
noun: (plural only) A steep-sided part of a stream channel, near the dalles proper, marked by clefts, ravines, or gorges.

(Definitions from Wiktionary)