0 a large bag used to carry things on your back, used especially by people who go camping or walking: --
1 to travel while carrying your clothes and other things that you need in a backpack, usually not spending very much money and staying in places that are not expensive: --
2 a bag carried on the back, usually of cloth with many pockets and straps that go over your shoulders, used to carry things --
3 to walk long distances, carrying your things in a backpack: --