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