from The American Heritage® Dictionary of the English Language, 4th Edition
- A river, about 1,287 km (800 mi) long, rising in the Hindu Kush and flowing southwest across Afghanistan to a marshy lake on the Iranian border.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. A region of Afghanistan, now specifically the name of an administrative province of the country and of the river running through it.
From Pashto هلمند, Persian هلمند, ultimately from Avestan Haētumant ("with dams") (Wiktionary)