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.
Vest definition, a close-fitting, waist-length, sleeveless garment that buttons down the front, designed to be worn under a jacket. See more.