The Academic Dictionary of Lithuanian is a comprehensive thesaurus of the Lithuanian language and one of the most extensive lexicographical works in the world. The 20 volumes encompassing 22,000 pages were published between 1941 and 2002 by the Institute of the Lithuanian Language. An online and a CD version was made available in 2005. It contains about 236,000 headwords, or 500,000 if counting sub-headwords, reflecting modern and historical language both from published texts since the first published book in 1547 until 2001 and recorded from the vernacular. Definitions, usage notes, and examples are given for most words. The entry length varies from one sentence to almost a hundred pages. For example, 46 pages are devoted to 298 different meanings of taisyti and its derivatives.

Simonas Daukantas was a Lithuanian/Samogitian historian, writer, and ethnographer. One of the pioneers of the Lithuanian National Revival, he is credited as the author of the first book on the history of Lithuania written in the Lithuanian language. Only a few of his works were published during his lifetime and he died in obscurity. However, his works were rediscovered during the later stages of the National Revival. His views reflected the three major trends of the 19th century: romanticism, nationalism, and liberalism.