Definition of "softcover"

softcover

adjective
not comparable
1. (publishing, of a book) Having covers made of paper or thin cardboard; paperback.
  Quotations
  It gives more emphasis to the literary novels and short-story collections reviewed so often in our pages (and sometimes published only in softcover).
  2007 September 23, The Editors, “Up Front”, in New York Times‎
noun
plural softcovers
1. (publishing) A book having such covers.