extensive high plain in W Tex. & SE N.Mex.: S extension of the Great Plains: c. 40,000 sq mi (103,600 sq km)
Origin:
Sp, lit., staked plain
See Llano Estacado in American Heritage Dictionary 4
An extensive, semiarid plateau region of the southern Great Plains in southeast New Mexico, western Texas, and northwest Oklahoma. The grazing lands also have resources of oil and natural gas.