The term for when two cultures blend together is called cultural assimilation or cultural hybridization. This process occurs when individuals or groups from different cultural backgrounds interact and exchange ideas, practices, and values, leading to the emergence of a new, blended culture. Cultural assimilation can happen through various means, such as migration, colonization, or globalization. While it can result in the enrichment of cultural practices, it may also lead to the loss of distinct cultural identities and traditions as one culture becomes dominant over the other.