What is a "briefcase"?

A briefcase is a rectangular box-shaped bag with a hinged lid, traditionally used by professionals to carry important documents, folders, and other work-related materials. It typically has a handle on top and a shoulder strap for carrying convenience. The briefcase often features several compartments, including a padded section to protect a laptop, and may have locks or clasps to secure its contents. It comes in various materials such as leather, nylon, or synthetic fabrics, and may be designed in a range of colors and styles to suit the user's preferences. The modern briefcase has evolved from the traditional hard-sided leather bags used in the mid-19th century to the more lightweight, functional, and stylish designs of today.