柯林斯詞典knapsack /?n?p?s?k/ (also backpack) (knapsacks) 1. N-COUNT A knapsack is a cloth or leather bag that you carry on your back or over your shoulder, for example when you are walking in the countryside. 背包 返回 knapsack劍橋詞典a bag carried on the back or over the shoulder , used especially by people who go walking or climbing for carrying food , clothes , etc. （徒步旅行者或登山者用的帆布或皮制的）小背包 返回 knapsack