<p><strong>Adverb</strong></p><ul><li>toward the back or rear</li><li>in the reverse of the usual or right way</li><li>toward the past</li><li>toward a less advanced state; retrogressively</li></ul><p><strong>Adjective</strong></p><ul><li>directed toward the back or past</li><li>reversed; returning</li><li>behind in time or progress; late; slow</li><li>bashful or hesitant; shy</li></ul>