Other forms: satchels
A satchel is a bag with a shoulder strap. People often carry their books in a leather satchel.
There are many types of luggage people use for carrying their belongings, such as suitcases, briefcases, purses, backpacks, and duffel bags. Another is the satchel, which is a small or medium-sized case with a flat bottom. A satchel usually has a shoulder strap which makes it easier to carry, and it's often full of books. The word satchel is related to sack, both coming from the Latin root saccus, or "bag."