knap ‧ sack /ˈnæpsæk/ BrE AmE noun [countable] American English
[ Date: 1600-1700 ; Language: Low German ; Origin: knappsack or Dutch knapzak 'food bag' ]
a bag that you carry on your shoulders SYN backpack , rucksack
knap ‧ sack /ˈnæpsæk/ BrE AmE noun [countable] American English
[ Date: 1600-1700 ; Language: Low German ; Origin: knappsack or Dutch knapzak 'food bag' ]
a bag that you carry on your shoulders SYN backpack , rucksack
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012