Color symbolism is the use of color as a representation or meaning of something that is usually specific to a particular culture or society. Context, culture and time are certainly important factors to consider when thinking about color symbolism.
Definition of backpack for English Language Learners. : a bag for carrying things that has two shoulder straps and is carried on the back.
Answer Wiki. I'd venture a guess that a knapsack meant a small carrying bag while a backpack could include a knapsack within its definition up to, and including, the huge backpacks that hikers, mountaineers, soldiers, etc., carry that could reach 50lbs or more. Views.