<p><strong>Noun</strong></p><ul><li>a case or covering for the blade of a sword, dagger, or the like.</li><li>any similar close-fitting covering or case.</li><li>a condom.</li><li>a closely enveloping part or structure, as in an animal or plant.</li><li>the leaf base when it forms a vertical coating surrounding the stem.</li><li>a close-fitting dress, skirt, or coat, especially an unbelted dress with a straight drape.</li><li>the metal covering of a cable.</li><li>the metal wall of a wave guide.</li><li>a space charge formed by ions near an electrode in a tube containing low-pressure gas.</li><li>the region of a space charge in a cathode-ray tube.</li></ul><p><strong>Verb</strong></p><ul><li>to sheathe.</li></ul>