<p><strong>Noun</strong></p><ul><li>Plural: waterworks</li><li>A complete system of reservoirs, pipelines, conduits, etc., by which water is collected, purified, stored, and pumped to urban users.</li><li>A pumping station or a purifying station of such a system.</li><li>A spectacular display of water, mechanically produced, as for a pageant.</li><li>Slang: tears, or the source of tears; to turn on the waterworks.</li><li>Slang: the kidneys.</li></ul>