back pack

Definitions of back pack
  1. noun
    a bag carried by a strap on your back or shoulder
    synonyms: backpack, haversack, knapsack, packsack, rucksack
    see moresee less
    types:
    kit bag, kitbag
    a knapsack (usually for a soldier)
    type of:
    bag
    a flexible container with a single opening
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