- a person or thing that folds
- a sheet of cardboard or heavy paper folded for holding loose papers, as in a file
- ☆ a circular with one or more folds, each section of which is a separate printed page
- One that folds or is folded, such as a booklet or pamphlet made of one or more folded sheets of paper.
- A flexible cover folded in the center and used as a holder for loose paper: a file folder; a hanging folder.
- Computers See directory.
- An organizer that papers are kept in, usually with an index tab, to be stored as a single unit in a filing cabinet.
- I keep all my schoolwork in a yellow folder.
- (computing) A virtual container in a computer's file system, in which files and other folders may be stored. The files and subfolders in a folder are usually related.
- My essays are in the folder named "Essays"
- A machine or person who folds things.
fold + -er
folder - Computer Definition
A subdivision of a storage device from the user's perspective (from the device's perspective, see sector). Folders contain files as well as other folders (subfolders), and they expand to accommodate content because they are not a fixed, physical entity. Folders create the illusion of compartments, but actually exist as electronic tables of contents. Folders are created by the operating system and applications when they are installed. Applications generally default to saving data in the Documents or My Documents folder; however, users can create and name their own folders, and the apps will generally use them the next time data are saved. For example, to create a new folder on the desktop, right click the desktop and select New Folder. Folders and Directories The folder metaphor was introduced on the Xerox Star in 1981; later popularized on the Mac and in Windows. In the earlier Unix and DOS environments, the same organization structure was called a "directory," and subfolders were called "subdirectories." Since the Mac actually became a Unix computer, and the Unix/Linux worlds thrive along with Windows, the terms "folder" and "directory" are used synonymously. In fact, it is not uncommon for people to intersperse the two terms in the same sentence. See files vs. folders, file and Win Folder organization.