[{"Bold_text": "noun", "List Items": ["a pack knapsack, often of canvas or nylon, to be carried on 's back ,sometimes supported on a lightweight metal frame strapped to the body.", "a piece of equipment designed to be used while being carried on the back."]}, {"Bold_text": "verb (used without object)", "List Items": ["to go on a hike, using a backpack:We went backpacking in the Adirondacks."]}, {"Bold_text": "verb (used with object)", "List Items": ["to place or carry in a backpack or on 's back."]}]