in the SW U.S., a flat desert valley surrounded by mountains and draining into a shallow lake in the center
Origin of bolsonAmerican Spanish bolsón from Sp, literally , big purse from bolsa, purse from Medieval Latin bursa: see bourse
nounChiefly Southwestern US
A flat arid valley surrounded by mountains and draining into a shallow central lake.
Origin of bolsonAmerican Spanish bolsón augmentative of Spanish bolsa purse, pouch from Late Latin bursa ; see bursa .