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