Where does this definition of bone up on come from?
This entry for bone up on is sourced from Main Dictionary, one of the dictionaries and corpora merged into Lughet.
Is bone up on a noun, verb, or something else?
In this entry, bone up on is tagged as 2v..
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.