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backpack

noun [C]
 
 
/ˈbæk.pæk/ (also rucksack)

Definition

a large bag used to carry things on your back, used especially by people who go walking or climbing: It's a frame backpack with a belt and padded shoulder straps.Containers for carrying personal possessions
(Definition of backpack noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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