What is meant by 'additive bilingualism' in language acquisition?

Additive bilingualism refers to a process in which an individual learns a second language while maintaining and enhancing their first language. This concept emphasizes that the acquisition of a second language enriches the learner's overall linguistic skills and cognitive abilities, rather than diminishing the proficiency in their first language.

In the context of language acquisition, additive bilingualism encourages the idea that being bilingual is beneficial, leading to improved cognitive flexibility, problem-solving skills, and cultural awareness. It contrasts with subtractive bilingualism, where the addition of a new language leads to a decline in the use or proficiency of the first language. Therefore, the notion that learning a first language while acquiring a second can enhance overall skills aligns perfectly with the principles of additive bilingualism.