What does lustrous mean?

Lustrous describes something that has a glowing, shiny, or radiant quality. This term is often used in relation to surfaces that reflect light well, such as polished metals or glossy finishes. When something is referred to as lustrous, it suggests that it catches the eye due to its brightness or sheen, enhancing its visual appeal and making it stand out. The correct answer, therefore, aligns perfectly with the definition of lustrous, emphasizing that this quality involves a certain brilliance or glow, as opposed to a lack of brightness or dullness, which would be suggested by options indicating dimness, mundaneness or opacity.