1. the quality or state of being famous and respected for achievements or high social position

Examples

• The illustriousness of the Nobel Prize winners was evident at the ceremony.
• Her family's illustriousness in the field of medicine spans three generations.
• The university's illustriousness attracts students from around the world.
• Despite his illustriousness as a scientist, he remained humble and approachable.
• The illustriousness of the ancient Greek philosophers continues to inspire modern thinkers.
• The museum displayed artifacts that reflected the illustriousness of the royal dynasty.