Where does this definition of under lock and key come from?
This entry for under lock and key is sourced from GetWord Corpus, one of the dictionaries and corpora merged into Lughet.
Is under lock and key a noun, verb, or something else?
In this entry, under lock and key is tagged as 2adv..
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.