The term "turning yellow" describes a condition where something that was once white or a bright color begins to fade or appear yellowed over time. There are several synonyms for this phenomenon, including discoloration, tarnishing, yellowing, and fading. These terms are often used to describe the effect of sunlight or prolonged exposure to the elements on objects such as fabrics, plastics, and metals, as well as the aging process on human skin. To prevent turning yellow, it is important to store objects properly and wash them regularly with gentle, pH-balanced cleansers. For skin, protecting it from the sun and using anti-aging products can help slow down the yellowing process.