Beautiful is an adjective often used to describe something that is aesthetically pleasing, such as a sunset or a work of art. It can also be used to describe someone's physical features or personality. For example, you might say "She is beautiful" to refer to the way someone looks or acts. Additionally, beautiful can also be used in more abstract contexts, such as describing a feeling or emotion. For example, you might say "The music was so beautiful" when referring to how it made you feel.