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