backpacknoun/ˈbæk.pæk/

• 1

  A knapsack, sometimes mounted on a light frame, but always supported by straps, worn on a person’s back for the purpose of carrying things, especially when hiking, or on a student's back when carrying books.

  • Rachel discovered that she could also keep things in her backpack that were important to her, nobody would know about them because they would be hidden. These important things included a small round rock that she had found […]
  • Many seats carry reservation labels, while the luggage racks are festooned with backpacks and suitcases.
• 2

  A similarly placed item containing a parachute or other life support equipment.

backpackverb/ˈbæk.pæk/

• 1

  To hike and camp overnight in backcountry with one's gear carried in a backpack.

  • I spent a month backpacking in the Rockies.
• 2

  To engage in low-cost, generally urban, travel with minimal luggage and frugal accommodation.

• 3

  rareTo place or carry (an item or items) in a backpack.

  • Astronauts backpack oxygen during spacewalks.
  • I planned to go to jungle today and backpacked my things which contained^([sic]) food and a note book.