What is "the great karroo"

Karroo \Kar*roo"\ (k[.a]r*r[=oo]"), n.; pl. Karroos (k[.a]r*r[=oo]z"). One of the dry table-lands of South Africa, which often rise terracelike to considerable elevations. [Also karoo.]

The Great Karroo, or The Karroo, a vast plateau, in Cape Colony, stretching through five degrees of longitude, at an elevation of about 3,000 feet.