from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To remove from a sling or a slung position: unsling a backpack.
- transitive v. Nautical To remove the slings of (a yard, for example).
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. to take something from a hanging, or slung position.
from the GNU version of the Collaborative International Dictionary of English
- transitive v. To take off the slings of, as a yard, a cask, or the like; to release from the slings.
from The Century Dictionary and Cyclopedia
- To remove from a position in which it has been slung; specifically (nautical), to take off the slings of, as a yard, a cask, etc.; release from slings.
From un- + sling (Wiktionary)