Wiktionary

Wiktionary is a multilingual, web-based project to create a free content dictionary of terms (including words, phrases, proverbs, linguistic reconstructions, etc.) in all natural languages and in a number of artificial languages. These entries may contain definitions, images for illustrations, pronunciations, etymologies, inflections, usage examples, quotations, related terms, and translations of words into other languages, among other features. It is collaboratively edited via a wiki. Its name is a portmanteau of the words "wiki" and "dictionary". It is available in 171 languages and in Simple English. Like its sister project Wikipedia, Wiktionary is run by the Wikimedia Foundation, and is written collaboratively by volunteers, dubbed "Wiktionarians". Its wiki software, MediaWiki, allows almost anyone with access to the website to create and edit entries.
Because Wiktionary is not limited by print space considerations, most of Wiktionary's language editions provide definitions and translations of words from many languages, and some editions offer additional informations typically found in thesauri.
Wiktionary data is frequently used in various natural language processing tasks.
History and development.
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. , Wiktionary features over 25.9 million entries across its editions. The largest of the language editions is the English Wiktionary, with over 6.6 million entries, followed by the French Wiktionary with over 4.1 million and the Malagasy Wiktionary with over 1.6 million entries. Forty-four Wiktionary language editions now contain over 100,000 entries each.
Most of the entries and 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 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 648,970 definitions the English Wiktionary provides for 501,171 English words, 217,850 are "form of" definitions of this kind. This means its coverage of English is slightly smaller than that of major monolingual print dictionaries. The "Oxford English Dictionary", for instance, has 615,000 headwords, while "Merriam-Webster's Third New International Dictionary of the English Language, Unabridged" has 475,000 entries (with many additional embedded headwords). 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. Almost all non-Malagasy-language entries of the Malagasy Wiktionary were copied by bot from other Wiktionaries. Like the English edition, the French Wiktionary has imported approximately 20,000 entries from the Unihan database of Chinese, Japanese, and Korean 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.
As of December 2019, en.wiktionary has over 700,000 gloss definitions and over 1,100,000 total definitions (including different forms) for English entries alone, with a total of over 6,100,000 entries across all languages.
Logos.
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 Brion 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. , 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".
Criteria for ensuring accuracy.
To ensure accuracy, the English Wiktionary has a policy requiring that terms be "attested". Terms in major languages such as English and Chinese must be verified by:
For less-documented languages such as Creek and extinct languages such as Latin, one use in a permanently recorded medium or one mention in a reference work is sufficient verification.
Multi-lingual.
As of , there are Wiktionary sites for languages of which are active and are closed. The active sites have articles, and the closed sites have articles. There are registered users of which are recently active. 
The top ten wiktionary language projects by mainspace article count:
For a complete list with totals see Wikimedia Statistics: 
Critical reception.
Critical reception of Wiktionary has been mixed. In 2006, Jill Lepore wrote in the article "Noah's Ark" for "The New Yorker,"
There's no show of hands at "Wiktionary". There's not even an editorial staff. "Be your own lexicographer!", might be "Wiktionary's" motto. Who needs experts? Why pay good money for a dictionary written by lexicographers when we could cobble one together ourselves?
"Wiktionary" isn't so much republican or democratic as Maoist. And it's only as good as the copyright-expired books from which it pilfers.
Keir Graff's review for "Booklist" was less critical:
Is there a place for Wiktionary? Undoubtedly. The industry and enthusiasm of its many creators are proof that there's a market. And it's wonderful to have another strong source to use when searching the odd terms that pop up in today's fast-changing world and the online environment. But as with so many Web sources (including this column), it's best used by sophisticated users in conjunction with more reputable sources.
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.
In 2005, "PC Magazine" rated Wiktionary as one of the Internet's "Top 101 Web Sites", although little information was given about the site.
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. Only 131 out of 4,748 Polish words have had their inflection data corrected.
Wiktionary data in natural language processing.
Wiktionary has semi-structured data. Wiktionary lexicographic data can be converted to machine-readable format in order to be used in natural language processing tasks.
Wiktionary data mining is a complex task. There are the following difficulties:
There are several parsers for different Wiktionary language editions:
Examples of natural language processing tasks which have been solved with the help of Wiktionary data include: