In India, originally, as a native word, Waste or uncultivated ground (= ‘forest’ in the original sense)… Land overgrown with underwood, long grass…

In Malaysia, Singapore, and Indonesia: secondary jungle or forest that grows up on previously cleared or cultivated land.

A thicket or jungle, in Southern India.

The upstream, interior part of Malaya; the Malayan jungle.

With the. The jungle; wild or rough country; (hence) a remote or unpopulated area; = boondock, n.