Wiktionary has grown beyond a standard dictionary and now includes a  thesaurus , a rhyme guide, phrase books, language statistics and extensive appendices. We aim to include not only the definition of a word, but also enough information to really understand it. Thus etymologies, pronunciations, sample quotations, synonyms, antonyms and translations are included.
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The original texts of Wiktionary entries are dual-licensed to the public under both the Creative Commons Attribution-ShareAlike 3.0 Unported License (CC-BY-SA) and the GNU Free Documentation License (GFDL). The full text of both licenses can be found at Wiktionary:Text of Creative Commons Attribution-ShareAlike 3.0 Unported License, as well as Wiktionary:Text of the GNU Free Documentation License. Permission is granted to copy, distribute and/or modify the text of all Wiktionary entries under the terms of the Creative Commons Attribution-ShareAlike 3.0 Unported License, and the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. Essentially, this means that the entries will remain free forever and can be used by anybody subject to the restrictions mentioned below, which serve to ensure that freedom.

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