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