<p><strong>Noun:</strong></p><ul><li>A substance formulated to prevent sunburn, skin cancers, and other conditions caused by excessive exposure to the sun, usually by absorbing and reflecting ultraviolet radiation.</li><li>A lotion, cream, etc., containing such a substance.</li><li>A latticework or similar construction to shield a patio, atrium, or the like, from direct sunlight.</li></ul>