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