suntan

A suntan is the brown color your skin gets after spending time in the sun. Many people connect it with summer, holidays, or time at the beach, but it is really a sign that the skin has reacted to UV radiation. In other words, the darker color appears because your skin is trying to protect itself. You might get one while swimming, walking, gardening, or sitting outside for a long time. Some people also get a similar result from tanning beds.

The word "suntan" combines "sun" and "tan." It became more common in the early 20th century as beach holidays and outdoor leisure grew in popularity. Grammatically, it is mainly used as a noun, as in "She came home with a deep suntan."

A suntan is the darkening of the skin caused by exposure to ultraviolet (UV) radiation, whether from sunlight or artificial sources like tanning beds. Contrary to popular belief, a tan isn't a sign of peak health; it is a biological defense mechanism. When UV rays penetrate the skin, they stimulate cells called melanocytes to produce melanin—the pigment responsible for skin color. Melanin absorbs some of the UV radiation to prevent it from damaging the DNA within your skin cells. This surge in melanin production is what creates the visible tan.

While many seek out a suntan for cosmetic reasons, any change in skin pigment due to UV exposure indicates that damage has occurred. Over time, intense or prolonged exposure can lead to painful sunburns, premature aging (like wrinkles and leathery texture), and a significantly increased risk of skin cancer.

The term "suntan" is a relatively modern addition to English, gaining traction alongside the rise of outdoor recreation in the 1920s. Before this period, pale skin was often preferred, and darker skin from outdoor exposure was described in other ways. Today, the word is strongly linked with summer culture, beach trips, and sunny weather. You may also see it in phrases like "suntan lotion," though modern products vary widely in how much sun protection they provide. Even when the look is considered attractive, the change in color is still a sign that the skin has been affected by UV exposure.