Wiktionary:Criteria for inclusion
As an international dictionary, Wiktionary is intended to include “all words in all languages”, subject to the following criteria.
A term should be included if it's likely that someone would run across it and want to know what it means. This in turn leads to the somewhat more formal guideline of including a term if it is attested and, when that is met, if it is a single word or it is idiomatic.
A term need not be limited to a single word in the usual sense. Any of these are also acceptable:
Where possible, it is better to cite sources that are likely to remain easily accessible over time, so that someone referring to Wiktionary years from now is likely to be able to find the original source. As Wiktionary is an online dictionary, this naturally favors media such as Usenet groups, which are durably archived by Google. Print media such as books and magazines will also do, particularly if their contents are indexed online. Other recorded media such as audio and video are also acceptable, provided they are of verifiable origin and are durably archived. We do not quote other Wikimedia sites (such as Wikipedia), but we may use quotations found on them (such as quotations from books available on Wikisource). When citing a quotation from a book, please include the ISBN.
This filters out appearance in raw word lists, commentary on the form of a word, such as “The word ‘foo’ has three letters,” lone definitions, and made-up examples of how a word might be used. For example, an appearance in someone’s online dictionary is suggestive, but it does not show the word actually used to convey meaning. On the other hand, a sentence like “They raised the jib (a small sail forward of the mainsail) in order to get the most out of the light wind,” appearing in an account of a sailboat race, would be fine. It happens to contain a definition, but the word is also used for its meaning.
For languages well documented on the Internet, three citations in which a term is used is the minimum number for inclusion in Wiktionary. For terms in extinct languages, one use in a contemporaneous source is the minimum, or one mention is adequate subject to the below requirements. For all other spoken languages that are living, only one use or mention is adequate, subject to the following requirements:
This serves to prevent double-counting of usages that are not truly distinct. Roughly speaking, we generally consider two uses of a term to be "independent" if they are in different sentences by different people, and to be non-independent if:
If two or more usages are not independent of each other, then only one of them can be used for purposes of attestation.
This is meant to filter out words that may appear and see brief use, but then never be used again. The one-year threshold is somewhat arbitrary, but appears to work well in practice.
An expression is idiomatic if its full meaning cannot be easily derived from the meaning of its separate components. Non-idiomatic expressions are called sum-of-parts (SOP).
This criterion is sometimes referred to as the fried egg test, as a fried egg generally means an egg (and generally a chicken egg or similar) fried in a particular way. It generally doesn't denote a scrambled egg, which may nonetheless be cooked by frying.
Phrasebook entries are very common expressions that are considered useful to non-native speakers. Although these are included as entries in the dictionary (in the main namespace), they are not usually considered in these terms. For instance, what is your name is clearly a summation of its parts.
Unidiomatic terms made up of multiple words are included if they are significantly more common than single-word spellings that meet criteria for inclusion; for example, coalmine meets criteria for inclusion, so its more common form coal mine is also included.
An attested integer word (such as twenty-three or twenty-third) or a decimal numeral (sequence of 0, ..., 9 digits) that is ≥ 0 and ≤ 100 should be kept even if it is not idiomatic. In sequences of digits such as 125, the digits are considered to be separate components for the purpose of idiomaticity, and therefore, the sequences are often not idiomatic.
In rare cases, a phrase that is arguably unidiomatic may be included by the consensus of the community, based on the determination of editors that inclusion of the term is likely to be useful to readers.
Idiomaticity rules apply to hyphenated compounds in the same way as to spaced phrases. For example, wine-lover, green-haired, harsh-sounding and ex-teacher are all excluded as they mean no more than the sum of their parts, while green-fingered and good-looking are included as idiomatic. The definition of a hyphenated compound merely as an attributive form of the corresponding spaced phrase is not eligible for inclusion. For example a definition of periodic-table as "attributive form of periodic table" is ineligible.
A translation hub (translation target) is a common English multi-word term or collocation that is useful for hosting translations. Some attested translation hubs should be included despite being non-idiomatic and some excluded, but there is no agreement on precise, all-encompassing rules for deciding which are which. Therefore, the following criteria for inclusion of attested non-idiomatic translation hubs are tentative:
Numbers, numerals, and ordinals over 100 that are not single words or are sequences of digits should not be included in the dictionary, unless the number, numeral, or ordinal in question has a separate idiomatic sense that meets the CFI.
Misspellings, common misspellings and variant spellings: Rare misspellings should be excluded while common misspellings should be included. There is no simple hard and fast rule, particularly in English, for determining whether a particular spelling is “correct”. Published grammars and style guides can be useful in that regard, as can statistics concerning the prevalence of various forms.
Most simple typos are much rarer than the most frequent spellings. Some words, however, are frequently misspelled. For example, occurred is often spelled with only one c or only one r, but only occurred is considered correct.
It is important to remember that most languages, including English, do not have an academy to establish rules of usage, and thus may be prone to uncertain spellings. This problem is less frequent, though not unknown, in languages such as Spanish where spelling may have legal support in some countries.
Regional or historical variations are not misspellings. For example, there are well-known differences between British and American spelling. A spelling considered incorrect in one region may not occur at all in another, and may even dominate in yet another.
The entries for such inflected forms as cameras, geese, asked, and were should indicate what form they are, and link to the main entry for the word (camera, goose, ask, or be, respectively, for the preceding examples). Except with multi-word idioms, they should not merely redirect.
Attested repetitive words formed by repeating letters or syllables in other attested words for emphasis, and having no other meaning in any language shall be treated as follows:
An example of repeated letters is the repeated "e" in "pleeease" and "pleeeeeease" compared to "please".
An example of repeated syllables is the repeated "ha" in "hahahahaha" compared to "hahaha".
As for repetition counting: "hahaha" is considered to have three repetitions, while "haha" has two repetitions.
To hard-redirect is to use "#REDIRECT", which immediately takes the reader to the target page.
The above treatment may be overriden by consensus, for example where a variation having four repetitions is more common, or where an additional repetition would cause the word to shift to a different pronunciation or intonation.
Many phrases take several forms. It is not necessary to include every conceivable variant. When present, minor variants should simply redirect to the main entry. For the main entry, prefer the most generic form, based on the following principles:
Prefer the generic personal pronoun one (one's) when an action is usually reflexive, and someone (someone's) when an action is usually not reflexive. Thus, feel one’s oats (preferable to feel his oats), breathe down someone's neck. Use of other personal pronouns, especially in the singular, should be avoided except where they are essential to the meaning.
Use the infinitive form of the verb (but without “to”) for the principal verb of a verbal phrase. Thus for the saying It’s raining cats and dogs, or It was raining cats and dogs, or I think it’s going to rain cats and dogs any minute now, or It’s rained cats and dogs for the last week solid the entry should be (and is) under rain cats and dogs. The other variants are derived by the usual rules of grammar (including the use of it with weather terms and other impersonal verbs).
A proverb entry's title begins with a lowercase letter, whether it is a full sentence or not. The first word may still be capitalized on its own:
All natural languages are acceptable. However, it is important to note that the question of whether a proposed language is considered a living language or a dialect of or alternate name for another language is inherently subjective in some cases, and either designation may have political overtones.
Constructed languages have not developed naturally, but are the product of conscious effort in the fulfillment of some purpose.
Some individual terms from constructed languages have been adopted into other languages. These should be treated as terms in the adoptive language, and the origin noted in the etymology, regardless of whether the constructed language as a whole is included.
Other constructed languages should not be included as entries or translations in the main namespace, but may have lexicons in the Appendix namespace at the community's discretion. One use in a durably archived source is the minimum attestation required for an individual entry in an appendix-only constructed language.
Terms in reconstructed languages such as Proto-Indo-European do not meet the criteria for inclusion. They may be entered in the Reconstruction namespace, and are referred to from etymology sections.
Terms originating in fictional universes which have three citations in separate works, but which do not have three citations which are independent of reference to that universe may be included only in appendices of words from that universe, and not in the main dictionary space. With respect to names of persons or places from fictional universes, they shall not be included unless they are used out of context in an attributive sense.
For purposes of defining a single work, a series of books, films, or television episodes by the same author, documenting the exploits of a common set of characters in a fictional universe (e.g. the Harry Potter books, Tolkien's Middle Earth books, the Star Wars films), shall be considered a single work in multiple parts.The vote "pl-2010-10/Disallowing certain appendices" is relevant to this section, without specifying text to be amended in this document, so please see it for details.
Wiktionary articles are about words, not about people or places. Articles about the specific places and people belong in Wikipedia.
The straightforward sarcastic use of irony, understatement and hyperbole does not usually qualify for inclusion. This means, for example, that big should not be defined as “(ironic) small”, “(understatement) gigantic” or “(hyperbole) moderately large”. Common rhetorical use can be explained in a usage note, a context tag (such as (usually sarcastic)) or as part of the literal definition. Terms which are seldom or never used literally (e.g. fat chance) are not covered by this rule, and can be included on their own merits.
Individual languages may have additional restrictions on inclusion. These will be mentioned on that language's About page. For instance, Wiktionary:English entry guidelines notes that the community has voted to not allow most modern English possessives.
All chemical formulae are Translingual. To be included, chemical formulae must be attested in publications that (1) are not written for a scientific or technical audience; (2) don't make clear that they're formulae by e.g. explicitly discussing chemical formulae or by listing their component parts; and (3) do not otherwise explain the meaning of the formula. So, a textbook saying "AsH₃ is made up of an As and three H atoms" wouldn't support AsH₃, but a murder mystery saying "the air in his scuba tank had been replaced with CO2" could support CO₂.
Names fall into several categories, including company names, the names of products, given names, family names, and the full names of specific people, places, and things. Wiktionary classifies all as proper nouns, but applies caveats to each.
Generic terms are common rather than proper nouns. For example: Remington is used as a synonym for any sort of rifle, and Hoover as a synonym for any sort of vacuum cleaner. (Both are also attested family name words, and are included on that basis as well, of course.) Hamburger is used as generic term for a type of sandwich. One good rule of thumb as to whether a name has become a generic word is whether the word can be used without capitalization (as indeed sandwich was in the previous sentence).
 Apart from genericized trademarks, this is measured objectively by the brand name’s use in at least three independent durably archived citations spanning a period of at least three years. The sources of these citations:A brand name for a product or service should be included if it has entered the lexicon.
If the term has legal protection as a trademark, the original source must not indicate such. The sources also must not be written:
The text preceding and surrounding the citation must not identify the product or service to which the brand name applies, whether by stating explicitly or implicitly some feature or use of the product or service from which its type and purpose may be surmised, or some inherent quality that is necessary for an understanding of the author’s intent.
Given names (such as David, Roger, and Peter) and family names (such as Baker, Bush, Rice, Smith, and Jones) are words, and subject to the same criteria for inclusion as any other words. Wiktionary has main articles giving etymologies, alternative spellings, meanings, and translations for given names and family names, and has two appendices for indexing those articles: Appendix:Names, Appendix:Surnames/A.
For most given names and family names, it is relatively easy to demonstrate that the word fulfills the criteria, as for most given names and family names the name words are in widespread use in both spoken communication and literature. However, being a name per se does not automatically qualify a word for inclusion. A new name, that has not been attested, is still a protologism. A name that occurs only in the works of fiction of a single author, a television series or a video game, or within a closed context such as the works of several authors writing about a single fictional universe, is not used independently and should not be included.
Wiktionary is not a genealogy database. Wiktionary articles on family names, for example, are not intended to be about the people who share the family name. They are about the name as a word. For example: Whilst Yoder will tell the reader that the word originated in Switzerland (as well as give its pronunciations and alternative spellings), it is not intended to include information about the ancestries of people who have the family name Yoder.
This section regulates the inclusion and exclusion of names of specific entities, that is, names of individual people, names of geographic features, names of celestial objects, names of mythological creatures, names and titles of various works, etc. Examples include the Internet, the Magna Carta, the Mona Lisa, the Qur'an, the Red Cross, the Titanic, and World War II.
A name of a specific entity must not be included if it does not meet the attestation requirement. Among those that do meet that requirement, many should be excluded while some should be included, but there is no agreement on precise, all-encompassing rules for deciding which are which. However, policies exist for names of certain kinds of entities. In particular:
Such definitions as are included should be succinct rather than encyclopedic.
Being a company name does not guarantee inclusion. To be included, the use of the company name other than its use as a trademark (i.e., a use as a common word or family name) has to be attested.
The following place names shall be included if they fulfill attestation requirements:
All place names not listed above shall be included if they have three citations of figurative use that fulfill attestation requirements. Most manmade structures, including buildings, airports, ports, bridges, canals, dams, tunnels, individual roads and streets, as well as gardens, parks, and beaches may only be attested through figurative use. Figurative use refers to figurative language (e.g., simile, metaphor, metonymy) that makes reference to one or more of the place's characteristics. In the case of simile and metaphor, the definition should note the place's relevant characteristics.
The figurative use requirement for place names not listed above does not apply to limited documentation languages. All place names in these languages shall be included if they fulfill attestation requirements.
The following names of celestial objects shall be included if they fulfill attestation requirements:
All systematic names of celestial objects, as well as celestial objects not listed above (including comets and manmade objects in space) shall be included if they have three citations of figurative use that fulfill attestation requirements, in the same manner as place names above. Geographic features on celestial objects are covered by the policy on place names.
The figurative use requirement for celestial objects not listed above does not apply to limited documentation languages. All names of celestial objects in these languages shall be included if they fulfill attestation requirements.
There is occasionally concern that adding an entry for a particular term will lead to entries for a large number of similar terms. This is not a problem, as each term is considered on its own based on its usage, not on the usage of terms similar in form.