Greater India, also known as the Indian cultural sphere, or the Indic world, is an area composed of several countries and regions in South Asia, East Asia and Southeast Asia that were historically influenced by Indian culture, which itself formed from the various distinct indigenous cultures of South Asia. It is an umbrella term encompassing the Indian subcontinent and surrounding countries, which are culturally linked through a diverse cultural cline. These countries have been transformed to varying degrees by the acceptance and introduction of cultural and institutional elements from each other.
Since around 500 BCE, Asia's expanding land and maritime trade had resulted in prolonged socio-economic and cultural stimulation and diffusion of Buddhist and Hindu beliefs into the region's cosmology, in particular in Southeast Asia and the Far-East.