Definition of multidialectalism in English:

multidialectalism

noun

  • Proficiency in speaking or understanding two or more dialects.

Origin

1970s; earliest use found in Language. From multidialectal + -ism, after multilingualism, bidialectalism.

Pronunciation

multidialectalism

/ˌmʌltɪdʌɪəˈlɛktlɪz(ə)m/