Wiktionary was brought online on December 12, 2002, following a proposal by Daniel Alston and an idea by Larry Sanger, co-founder of Wikipedia. On March 28, 2004, the first non-English Wiktionaries were initiated in French and Polish. Wiktionaries in numerous other languages have since been started. Wiktionary was hosted on a temporary domain name (wiktionary.wikipedia.org) until May 1, 2004, when it switched to the current domain name. As of July 2021, Wiktionary features over 30 million articles (and even more entries) across its editions. The largest of the language editions is the English Wiktionary, with over 7.5 million entries, followed by the French Wiktionary with over 4.7 million and the Malagasy Wiktionary with over 3.5 million entries. Forty-three Wiktionary language editions contain over 100,000 entries each.
Many of the definitions at the project's largest language editions were created by bots that found creative ways to generate entries or (rarely) automatically imported thousands of entries from previously published dictionaries. Seven of the 18 bots registered at the English Wiktionary in 2007 created 163,000 of the entries there.
Another of these bots, "ThirdPersBot", was responsible for the addition of a number of third-person conjugations that would not have received their own entries in standard dictionaries; for instance, it defined "smoulders" as the "third-person singular simple present form of smoulder." Of the 1,269,938 definitions the English Wiktionary provides for 996,450 English words, 478,068 are "form of" definitions of this kind. This means that even without such entries, its coverage of English is significantly larger than that of major monolingual print dictionaries. Merriam-Webster's Third New International Dictionary of the English Language, Unabridged, for instance, has 475,000 entries (with many additional embedded headwords); the Oxford English Dictionary has 615,000 headwords, but includes Middle English as well, for which the English Wiktionary has an additional
34,234 gloss definitions. Detailed statistics exist to show how many entries of various kinds exist.
The English Wiktionary does not rely on bots to the extent that some other editions do. The French and Vietnamese Wiktionaries, for example, imported large sections of the Free Vietnamese Dictionary Project (FVDP), which provides free content bilingual dictionaries to and from Vietnamese. These imported entries make up virtually all of the Vietnamese edition's contents. Like the English edition, the French Wiktionary has imported approximately 20,000 entries from the Unihan database of Chinese, Japanese, Korean and Indian characters. The French Wiktionary grew rapidly in 2006 thanks in a large part to bots copying many entries from old, freely licensed dictionaries, such as the eighth edition of the Dictionnaire de l'Académie française (1935, around 35,000 words), and using bots to add words from other Wiktionary editions with French translations. The Russian edition grew by nearly 80,000 entries as "LXbot" added boilerplate entries (with headings, but without definitions) for words in English and German.
Wiktionary has historically lacked a uniform logo across its numerous language editions. Some editions use logos that depict a dictionary entry about the term "Wiktionary", based on the previous English Wiktionary logo, which was designed by Brooke Vibber, a MediaWiki developer. Because a purely textual logo must vary considerably from language to language, a four-phase contest to adopt a uniform logo was held at the Wikimedia Meta-Wiki from September to October 2006. Some communities adopted the winning entry by "Smurrayinchester", a 3×3 grid of wooden tiles, each bearing a character from a different writing system. However, the poll did not see as much participation from the Wiktionary community as some community members had hoped, and a number of the larger wikis ultimately kept their textual logos.
In April 2009, the issue was resurrected with a new contest. This time, a depiction by "AAEngelman" of an open hardbound dictionary won a head-to-head vote against the 2006 logo, but the process to refine and adopt the new logo then stalled. In the following years, some wikis replaced their textual logos with one of the two newer logos. In 2012, 55 wikis that had been using the English Wiktionary logo received localized versions of the 2006 design by "Smurrayinchester". In July 2016, the English Wiktionary adopted a variant of this logo. As of 4 July 2016, 135 wikis, representing 61% of Wiktionary's entries, use a logo based on the 2006 design by "Smurrayinchester", 33 wikis (36%) use a textual logo, and three wikis (3%) use the 2009 design by "AAEngelman".
As of May 2025, there are Wiktionary sites for 196 languages of which 172 are active and 24 are closed. The active sites have 44,251,160 articles, and the closed sites have 339 articles. There are 7,537,043 registered users of which 6,334 are recently active.
References in other publications are fleeting and part of larger discussions of Wikipedia, not progressing beyond a definition, although David Brooks in The Nashua Telegraph described it as "wild and woolly". One of the impediments to independent coverage of Wiktionary is the continuing confusion that it is merely an extension of Wikipedia.
The measure of correctness of the inflections for a subset of the Polish words in the English Wiktionary showed that this grammatical data is very stable (a study showed that only 131 out of 4,748 Polish words have had their inflection data corrected).
"Wikipedia mailing list archive discussion announcing the opening of the Wiktionary project". December 12, 2002. Archived from the original on June 20, 2014. Retrieved May 3, 2011. https://lists.wikimedia.org/pipermail/wikipedia-l/2002-December/008311.html
Wikipedia mailing list archive discussion from Larry Sanger giving the idea on Wiktionary Archived June 20, 2014, at the Wayback Machine – Retrieved May 3, 2011 https://lists.wikimedia.org/pipermail/wikipedia-l/2001-April/000076.html
Wiktionary's current URL is www.wiktionary.org https://www.wiktionary.org/
"Wiktionary". www.wiktionary.org. Archived from the original on September 13, 2008. Retrieved October 28, 2021. https://www.wiktionary.org/
Wiktionary total article counts are here. Detailed statistics by word type are available here [1]. https://meta.wikimedia.org/wiki/Wiktionary
The user list at the English Wiktionary identifies accounts that have been given "bot status". https://en.wiktionary.org/w/index.php?title=Special%3AListUsers&username=&group=bot&limit=60
TheDaveBot Archived October 11, 2007, at the Wayback Machine, TheCheatBot Archived October 11, 2007, at the Wayback Machine, Websterbot Archived October 11, 2007, at the Wayback Machine, PastBot Archived October 11, 2007, at the Wayback Machine, NanshuBot Archived October 11, 2007, at the Wayback Machine http://tools.wikimedia.de/~interiot/cgi-bin/count_edits?user=TheDaveBot&dbname=enwiktionary_p
Detailed statistics Archived July 23, 2021, at the Wayback Machine as of July 21, 2021 https://en.wiktionary.org/w/index.php?title=Wiktionary:Statistics/generated&oldid=63135332
Hồ Ngọc Đức, Free Vietnamese Dictionary Project. Details at the Vietnamese Wiktionary. http://www.informatik.uni-leipzig.de/~duc/Dict/
"LXbot". Archived from the original on May 24, 2008. https://web.archive.org/web/20080524015303/http://tools.wikimedia.de/~interiot/cgi-bin/count_edits?user=LXbot&dbname=ruwiktionary_p
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"Wiktionary talk:Wiktionary Logo", English Wiktionary, Wikimedia Foundation. https://en.wiktionary.org/wiki/Wiktionary_talk:Wiktionary_Logo
"Wiktionary/logo", Meta-Wiki, Wikimedia Foundation. https://meta.wikimedia.org/wiki/Wiktionary/logo
"Wiktionary/logo", Meta-Wiki, Wikimedia Foundation. https://meta.wikimedia.org/wiki/Wiktionary/logo
"Wiktionary/logo/refresh/voting", Meta-Wiki, Wikimedia Foundation. https://meta.wikimedia.org/wiki/Wiktionary/logo/refresh/voting
[Translators-l] 56 Wiktionaries got a localised logo https://lists.wikimedia.org/pipermail/translators-l/2012-December/002193.html
phab:T139255 https://phabricator.wikimedia.org/T139255
m:Wiktionary/logo#Logo use statistics. https://meta.wikimedia.org/wiki/Wiktionary/logo#Logo_use_statistics
Wikimedia's MediaWiki API:Sitematrix. Retrieved May 2025 from Data:Wikipedia statistics/meta.tab /wiki/Wikimedia
Wikimedia's MediaWiki API:Siteinfo. Retrieved May 2025 from Data:Wikipedia statistics/data.tab /wiki/Wikimedia
Wikimedia's MediaWiki API:Siteinfo. Retrieved May 2025 from Data:Wikipedia statistics/data.tab /wiki/Wikimedia
Wikimedia's MediaWiki API:Siteinfo. Retrieved May 2025 from Data:Wikipedia statistics/data.tab /wiki/Wikimedia
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The full article is not available on-line.[15]
David Brooks, "Online, interactive encyclopedia not just for geeks anymore, because everyone seems to need it now, more than ever!" The Nashua Telegraph (August 4, 2004)
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E.g. compare the entry structure and formatting rules in English Wiktionary and Russian Wiktionary. https://en.wiktionary.org/wiki/Wiktionary:Entry_layout_explained
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Quotations are extracted only from Russian Wiktionary.[33]
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If there are several IPA notations on a Wiktionary page – either for different languages or for pronunciation variants, then the first pronunciation was extracted.[39]
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The source code and the results of POS-tagging are available at https://code.google.com/p/wikily-supervised-pos-tagger https://code.google.com/p/wikily-supervised-pos-tagger
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