Definition of knapsack in English:

knapsack

Syllabification: knap·sack
Pronunciation: /ˈnapˌsak
 
/

noun

A bag with shoulder straps, carried on the back, and typically made of canvas or other weatherproof material.
More example sentences
  • The soldiers, dressed in bright green fatigues with knapsacks on their backs, filed through Jean Lesage Airport to meet loved ones who cheered and clapped.
  • The second girl reluctantly produced a pack of cigarettes from her knapsack and offered one to the man.
  • The thefts have occurred primarily at the DP library, where unattended knapsacks left inside study booths present an attractive opportunity for thieves.
Synonyms

Origin

early 17th century: from Middle Low German, from Dutch knapzack, probably from German knappen 'to bite' + zak 'sack'.

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