"Brighten" refers to the act of making something lighter or more illuminated. This can apply to physical spaces, such as a room that is made brighter with additional lighting, or to emotional states, where someone might feel happier or more positive. The term is often used in various contexts, including art, design, and personal well-being. In the context of photography, "brighten" can also refer to adjusting the exposure or brightness of an image to enhance its visual appeal. Similarly, in interior design, brightening a space can involve using lighter colors or reflective surfaces to create a more open and inviting atmosphere.