1. the quality or state of comprising or representing multiple ethnic groups or cultures
Usage: often used in academic, sociological, and policy contexts; typically uncountable

Examples

• The city's multiethnicity is reflected in its diverse neighborhoods and restaurants.
• Schools are increasingly celebrating multiethnicity through cultural awareness programs.
• The nation's multiethnicity has shaped its unique identity and traditions.
• Multiethnicity in the workplace can foster innovation and different perspectives.
• The region's multiethnicity presents both opportunities and challenges for social cohesion.
• Urban centers often exhibit greater multiethnicity than rural areas.