Where does this definition of barrier penetration come from?
This entry for barrier penetration is sourced from GetWord Corpus, one of the dictionaries and corpora merged into Lughet.
Does barrier penetration appear elsewhere on Lughet?
Yes — barrier penetration 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.