<p><strong>Noun:</strong></p><ul><li>A jet or current of water, sometimes with a dissolved medicating or cleansing agent, applied to a body part, organ, or cavity for medicinal or hygienic purposes.</li><li>The application of such a jet.</li><li>An instrument, as a syringe, for administering it.</li><li>A bath administered by such a jet.</li><li>Slang: Vulgar, douchebag (def 2).</li></ul><p><strong>Verb (used with object):</strong></p><ul><li>To apply a douche to.</li></ul><p><strong>Verb (used without object):</strong></p><ul><li>To use a douche or douches; undergo douching.</li></ul>