paperback paperback /ˈpeɪpɝˌbæk/

adjective

1. (of books) having a flexible binding  ( paperback , paperbacked , paperbound [American] )
   (of books) having a flexible binding
    It is impossible to get the book you want in the paperback edition
   It is impossible to get the book you want in the paperback edition
   

noun

1. () A book with paper covers  ( paper-back book , paperback book , soft-cover , paperback , soft-cover book , softback , softback book )
   a book with paper covers