Where does this definition of free air correction come from?
This entry for free air correction is sourced from Main Dictionary, one of the dictionaries and corpora merged into Lughet.
Does free air correction appear elsewhere on Lughet?
Yes — free air correction 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.