n. A backpack, knapsack, rucksack or similar bag packed with provisions or personal items, especially as carried by a traveller or a hiker, and often slung over the shoulder.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a bag carried by a strap on your back or shoulder
Word Usage
"He left his bag, hunkered in the dark and opened the packsack that had been his pillow with fingers too schooled to need light."