Noun folder has 2 senses
  1. booklet, brochure, folder, leaflet, pamphlet - a small book usually having a paper cover
    --1 is a kind of book
    --1 has particulars: blue book; ticket book
  2. folder - covering that is folded over to protect the contents
    --2 is a kind of
    --2 has particulars: file folder; matchbook
    Derived form: verb fold1