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English definition of “backpack”

backpack

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

backpack

verb [I] uk   /ˈbæk.pæk/ us  
to visit places, usually far from your home, carrying your clothes and other things that you need in a backpack: We backpacked around Thailand.
(Definition of backpack from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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