Noun back pack has 1 sense
  1. backpack, back pack, knapsack, packsack, rucksack, haversack - a bag carried by a strap on your back or shoulder
    --1 is a kind of bag
    --1 has particulars: kitbag, kit bag
,Verb back pack has 1 sense
  1. backpack, pack - hike with a backpack; "Every summer they are backpacking in the Rockies"
    --1 is one way to hike
    Derived form: noun backpack1
    Sample sentences:
    Sam and Sue backpack
    They backpack up the hill
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