Õigekeelsussõnaraamatut
Õigekeelsussõnaraamatut, often abbreviated as ÕS, is the primary official orthographic dictionary of the Estonian language. It serves as the authoritative guide for correct Estonian spelling, grammar, and word usage. The first comprehensive Õigekeelsussõnaraamatut was published in 1918, compiled by linguists Johannes Aavik and Albert Saareste. Subsequent editions have been published periodically, reflecting changes and developments in the language.
The dictionary aims to standardize the written form of Estonian, providing guidance on spelling, hyphenation, capitalization,
Currently, the most recent edition is ÕS 2018, which was released to mark the centenary of the