Where does this definition of not all that come from?
This entry for not all that is sourced from Main Dictionary, one of the dictionaries and corpora merged into Lughet.
Does not all that appear elsewhere on Lughet?
Yes — not all that 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.