D defs.my
Entry 1 sense Webster, 1913

Folder

/fōl'-dẽr/ · Fold·er · IPA /ˈfoʊɫdɚ/
01 n. One who, or that which, folds; esp., a flat, knifelike instrument used for folding paper.
  1. 1.
    One who, or that which, folds; esp., a flat, knifelike instrument used for folding paper.