The action of one that binds. Something that binds or is used as a binder. The cover that holds together the pages of a book. A strip sewn or attached over or along an edge for protection, reinforcement, or ornamentation. Sports Fastenings on a ski for securing the boot. Serving to bind. Uncomfortably tight and confining. Imposing or commanding adherence to a commitment, an obligation, or a duty: binding arbitration; a binding agreement.