Definitions for "First language"
Keywords:  tongue, native, mother, tive, learn
the first language(s) acquired by a person; also known as NA-TIVE LANGUAGE or MOTHER TONGUE. A person who acquires more than one language from infancy or early childhood may have more than one first language.
one's native language; the language learned by children and passed from one generation to the next
The language learned first by an individual; also called home language or native language.