Wiktionary is an online dictionary and thesaurus that is free to use and open to anyone. It is a collaborative project that is supported by the Wikimedia Foundation, and is available in over 300 languages. It contains more than 30 million entries in over 200 languages, including definitions, translations, etymologies, pronunciations, and more. Wiktionary can be used for language learning, to look up words, and to find synonyms and antonyms for words. It also has a built-in search engine and can be accessed via a web browser or mobile app. Wiktionary is updated often and is a great resource for anyone looking for a comprehensive and up-to-date dictionary and thesaurus.
Discontinued The project seems to be no longer updated. Last version, 3.0.6, released in January 2015, but can still be downloaded from SourceForge.
Google translate only translates the word without putting it in context, however, wikitionary gives you the plural of the noun and puts it in context.