backpackEnglishOxford Dictionary of Englishbackpack /ˈbakpak / ▸ noun a rucksack. ▪ a piece of equipment carried on a person's back: he went to the trunk and pulled out a two-tank scuba backpack. ▸ verb [no object] travel or hike carrying one's belongings in a rucksack: he has backpacked around the world (backpacking as noun) a week's backpacking in the Pyrenees.