Where does this definition of air letter come from?
This entry for air letter is sourced from Main Dictionary, one of the dictionaries and corpora merged into Lughet.
Is air letter a noun, verb, or something else?
In this entry, air letter is tagged as 2n..
Does air letter appear elsewhere on Lughet?
Yes — air letter 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.