<p><strong>Noun:</strong></p><ul><li>any of various dark-colored viscid products obtained by the destructive distillation of certain organic substances, as coal or wood.</li><li>coal-tar pitch.</li><li>smoke solids or components: cigarette tar.</li></ul><p><strong>Verb:</strong></p><ul><li>(used with object) tarred, tar·ring: to smear or cover with or as if with tar.</li></ul><p><strong>Adjective:</strong></p><ul><li>of or characteristic of tar.</li><li>covered or smeared with tar; tarred.</li></ul>