: It refers to Mudra , an author or contributor whose works provided the contextual "basis" for many of the dictionary's definitions.
The "MUDR" abbreviation is most commonly found in historical linguistic resources, such as the Full text of the Českoněmecký slovník , a significant 19th-century Czech-German dictionary. XВўode Basis Drive: MUDR 197
: It allows us to see how language was used in the 1800s. : It refers to Mudra , an author