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.
Definition of bag for English Language Learners. : 1  a container made of thin material (such as paper, plastic, or cloth) that opens at the top and is used for holding or carrying things. : 2  a soft container carried by a woman and used to hold money and other small things (such as keys or makeup)