Other forms: rucksacks
A rucksack is a large bag carried on the back. Shoulder the rucksack, pack the rucksack, a heavy rucksack.
It is the British walking word; backpack is commoner generally and the Americans use it for everything. The word is German and means back sack, and the weight should sit on the hips rather than the shoulders.
1nounrucksackA large bag carried on the back.
“She packed a sandwich and a raincoat into her rucksack and set off up the hill.”
rucksack is a bag.
Also accepted in games: backpack
German
Rucksack
English, today
rucksack
Borrowed from German Rucksack.
Etymology from Wiktionary, CC BY-SA