1. (verb)backpack, back pack, knapsack, packsack, rucksack, haversack a bag carried by a strap on your back or shoulder Synonyms: knapsack, rucksack, backpack, packsack, haversack, back pack
2. (verb)backpack, pack hike with a backpack Synonyms: bundle, take, jam, mob, pack, compact, pile, tamp down, tamp, backpack, carry, wad, throng, load down