paperback I. \ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷\noun : a paperback book — called also paperbook, paperbound, paper-cover, soft-cover II. \| ̷ ̷ ̷ ̷| ̷ ̷\adjective alsopaperbacked\| ̷ ̷ ̷ ̷| ̷ ̷\ 1.of a book: made without rounding, backing, or rigid boards and usually trimmed flush : paperbound, paper-cover, soft-cover < paperback mysteries > < paperback reprints > 2.: of or relating to paperback books < paperback storytelling >