Is there a good monolingual learner's dictionary for Chinese? Something that can be useful for an intermediate language student of a language is a monolingual learner's dictionary, which uses a restricted set of vocabulary to define a much larger set of headwords. A particularly impressive example of this for English is Learn These Words Dictionary, which starts with just 60 vocabulary words and builds up in several layers to the 2000 words used in the definitions in the 70,000 Longman English Dictionary. Does anything like this exist for Chinese?
i would recommend the 國語辭典. it’s authoritative, maintained by the 教育部, of taiwan:

http://dict.revised.moe.edu.tw/cbdic/search.htm

further, you can download it freely (cc 3.0 licence):

https://resources.publicense.moe.edu.tw/index.html