<p><strong>Noun</strong></p><ul><li>A person who rises, especially from bed: to be an early riser.</li><li>The vertical face of a stair step.</li><li>Any of a group of long boards or narrow platforms that can be combined in stepwise fashion: The choir stood on a horseshoe of risers behind the orchestra.</li><li>A vertical pipe, duct, or conduit.</li><li>Metallurgy: a chamber or enlarged opening at the top of a mold for allowing air to escape or adding extra metal.</li><li>Nautical: a heavy strake of planking in the vicinity of the garboard strake in a wooden vessel.</li></ul><p><strong>End of Response</strong></p>