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