<p><strong>Noun</strong></p><ul><li>the back of the skirt on a man's coat or jacket.</li><li>one of the two back parts of the skirt of a coat, especially one of the tails on a tailcoat.</li></ul><p><strong>Adjective</strong></p><ul><li>gained by association with another, especially with a successful or celebrated person: coattail benefits.</li></ul>