<p><strong>Noun</strong></p><ul><li>a tool for pounding or grinding substances in a mortar.</li><li>any of various appliances for pounding, stamping, etc.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) to pound or grind with or as if with a pestle.</li><li>(used without object) to work with a pestle.</li></ul>