I. ˈfōldə(r) noun
( -s )
Etymology: from fold (III) + -er
1. : one that folds: as
a. : an instrument or machine for folding paper, leather, or other flexible material
b. : a worker who folds or who operates a folding machine
c. : cleaner 1e
2. : a printed circular folded usually so that the printed matter does not cross the fold
advertising folder
railroad timetable folder
— compare broadside
3. : a folded cover or large envelope for holding or filing loose papers
4. : a cut and creased flat piece of paperboard or corrugated board designed to be folded and secured as a shipping case (as for a book)
II. noun
: an organizational element of a computer operating system used to group files or other folders together and usually represented in a graphical user interface by an icon resembling a filing folder