<p><strong>Verb</strong></p><ul><li>(used with object) invaginated, invaginating.<ul><li>To insert or receive, as into a sheath; sheathe.</li><li>To fold or draw (a tubular organ) back within itself; intussuscept.</li></ul></li></ul><p><strong>Verb</strong></p><ul><li>(used without object)<ul><li>To become invaginated; undergo invagination.</li><li>To form a pocket by turning in.</li></ul></li></ul><p><strong>Adjective</strong></p><ul><li>Folded or turned back upon itself; sheathed.</li></ul>