A folded cover or holder, typically made of stiff paper or cardboard, used for storing loose papers. She placed the important documents in a folder to keep them organized.
A directory or location on a computer where files can be stored and organized. He created a new folder on his desktop to save all his project files.
A person or machine that folds something such as letters, garments, or printed sheets. The automatic folder processed thousands of brochures per hour.
He always carried a small folder when hiking.