Where does this definition of sound film come from?
This entry for sound film is sourced from Main Dictionary, one of the dictionaries and corpora merged into Lughet.
Is sound film a noun, verb, or something else?
In this entry, sound film is tagged as 2n..
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.