- an arid mountainous region in S Asia, in SE Iran and SW Pakistan, bordering on the Arabian Sea.
- a former territory of W British India, now incorporated into Pakistan.
- a mountainous region of SW Asia, in SW Pakistan and SE Iran
- a province of SW Pakistan: a former territory of British India (until 1947). Capital: Quetta. Pop: Pop: 7 450 000 (2003 est)