<p><strong>Noun</strong></p><ul><li>Nautical: Any of various wall-like constructions inside a vessel, as for forming watertight compartments, subdividing space, or strengthening the structure.</li><li>Aeronautics: A transverse partition or reinforcing frame in the body of an airplane.</li><li>Civil Engineering: A partition built in a subterranean passage to prevent the passage of air, water, or mud.</li><li>A retaining structure of timber, steel, or reinforced concrete, used for shore protection and in harbor works.</li><li>Building Trades: A horizontal or inclined outside door over a stairway leading to a cellar.</li><li>A boxlike structure, as on a roof, covering a stairwell or other opening.</li></ul>