<p><strong>noun</strong></p><ul><li>a book bound in a flexible paper cover, often a lower-priced edition of a hardcover book.</li></ul><p><strong>adjective</strong></p><ul><li>(of a book) bound in a flexible paper cover: a paperback edition of Orwell's novel.</li><li>of, for, or pertaining to paperbacks: a paperback bookstore.</li></ul>