1The longest river in Afghanistan. Rising in the Hindu Kush, it flows 1,125 km (700 miles), generally south-west, before emptying into marshland near the Iran–Afghanistan frontier.
1.1A province in south-western Afghanistan.
Definition of Helmand in US English:
Helmand
proper nounˈhelmənd
1The longest river in Afghanistan. Rising in the Hindu Kush, it flows southwest for 700 miles (1,125 km) before emptying into marshland near the Iran–Afghanistan frontier.