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