<p><strong>Noun</strong></p><ul><li>a partially or mostly burned piece of coal, wood, etc.</li><li>cinders, any residue of combustion; ashes.</li><li>Geology. coarse scoriae erupted by volcanoes.</li><li>a live, flameless coal; ember.</li><li>Metallurgy. slag 1 (def 1).</li><li>a mixture of ashes and slag.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) to spread cinders on: The highway department salted and cindered the icy roads.</li><li>Archaic. to reduce to cinders.</li><li>(used without object) to spread cinders on a surface, as a road or sidewalk: My neighbor began cindering as soon as the first snowflake fell.</li></ul>