Deutsches Wörterbuch - Wikipedia

On August 29, 1838, Jacob and Wilhelm Grimm announced their intention to publish a German Dictionary (eventually completed 1961, one hundred and 23 years later). From the article:

"The Deutsches Wörterbuch (German: [ˌdɔʏtʃəs ˈvœʁtɐbuːx], The German Dictionary), abbreviated DWB, is the largest and most comprehensive dictionary of the German language in existence.[1][2] Encompassing modern High German vocabulary in use since 1450, it also includes loanwords adopted from other languages into German. Entries cover the etymology, meanings, attested forms, synonyms, usage peculiarities, and regional differences of words found throughout the German speaking world. The dictionary's historical linguistics approach, illuminated by examples from primary source documents, makes it to German what the Oxford English Dictionary is to English.[3] The first completed DWB lists over 330,000 headwords in 67,000 print columns spanning 32 volumes.[4]

The Deutsches Wörterbuch was begun by the Brothers Grimm in 1838 and the initial volumes were published in 1854. Unfinished at the time of their deaths, the dictionary was finally completed by a succession of later scholars and institutions in 1961.[1] In 1971, a 33rd supplement volume was published containing 25,000 additional entries. New research projects began in 2004 to expand and update the oldest parts of the dictionary to modern academic standards. Volumes A–F were planned for completion in 2012 by the Language Research Centre at the Berlin-Brandenburg Academy of Sciences and Humanities[4] and the University of Göttingen.[2] "