Wiktionary (English Wiktionary) - freely updated dictionary based on the wiki engine. One of the projects of the Wikimedia Foundation.
The dictionary contains grammatical descriptions, interpretations and translations of words. In addition, articles may reflect information about the semantic links of words. Thus, Wiktionary is an attempt to combine grammatical, explanatory, etymological and multilingual dictionaries as well as a thesaurus in one product.
Source: https://habr.com/ru/post/22552/