Step 1: Definition:
Cultural diversity refers to the existence of a wide variety of distinct cultural groups - differing in language, religion, region, food, dress, customs and traditions - coexisting within the same society or nation.
Step 2: India as an example:
India is one of the most culturally diverse countries in the world, with numerous languages, religions, regional traditions and tribal cultures existing side by side within a single political unit.
Final Answer:
Cultural diversity is the coexistence of multiple distinct cultural, linguistic, religious and regional groups within one society, as seen prominently in India.