Where does this definition of first language come from?
This entry for first language is sourced from Main Dictionary, one of the dictionaries and corpora merged into Lughet.
Does first language appear elsewhere on Lughet?
Yes — first language appears under other sources or language pairs in Lughet's collection. See the list below.
What is Lughet?
Lughet is a free trilingual dictionary covering nearly five million entries across Uyghur, Chinese, and English, drawn from more than ten source dictionaries and corpora.