A bangle is an inflexible but loose-fitting bracelet, worn alone or with many other bangles, on your wrist. Bollywood dancers are often outfitted with many gold bangles.
A bangle is generally made out of some hard material like gold, silver, wood, plastic, or ivory. In most parts of South Asia, bangles are very commonly worn by women — there are special bangles that a bride, for example, traditionally wears at her wedding. In Hinduism, it's actually considered bad luck for a bride not to wear bangles. The root of bangle is the Hindi word bangri, "colored glass bracelet or anklet."