<p><strong>Noun:</strong></p><ul><li>the solid product resulting from the destructive distillation of coal in an oven or closed chamber or by imperfect combustion, consisting principally of carbon: used chiefly as a fuel in metallurgy to reduce metallic oxides to metals.</li></ul><p><strong>Verb:</strong></p><ul><li>to convert into or become coke.</li></ul>