A "traditional backpack" refers to a regular style of backpack that has been widely used for a long time. It usually has two shoulder straps and a main compartment for carrying belongings. Full definition
Not only was his observation counterintuitive, but it also flew in the face of traditional backpacking dogma, which prescribes that a pack's weight be proportional to the hiker's weight. (sciencemag.org)
Because they are meant to be worn like traditional backpacks, these diaper bags allow you to more easily multitask which are perfect for any parent. (earlymomentsmatter.org)
Returning to school after spring break on Monday, April 2, 2018, students at Marjory Stoneman Douglas High School carry their items in plastic bags instead of traditional backpacks. (sun-sentinel.com)