Definition from Wiktionary, the free dictionary
- A process by which the culture of an isolated society changes on contact with a different one, especially a more advanced society.
- A process by which a person acquires the culture of the society that he/she inhabits, starting at birth.
Usage notes 
- Some social scientists reverse the meanings of enculturation and acculturation. Primary socialization is sometimes called enculturation, while secondary socialization is sometimes called acculturation.
process by which the culture of an isolated society changes