What is the term for when a culture accepts new ideas?

The term for when a culture accepts new ideas is "cultural assimilation." This process involves the integration of new beliefs, practices, or innovations into an existing cultural framework, often leading to changes in social norms and values. It can occur through various means, such as migration, globalization, or exposure to different cultures. Another related concept is "cultural diffusion," which specifically refers to the spread of cultural elements from one society to another.