Wiktionary is a collaborative, freely accessible dictionary and thesaurus project created and edited by volunteers. Built on the same wiki software model as other free knowledge projects, it aims to document words, senses and related information for many languages in one place. The project combines the functions of a dictionary — definitions, parts of speech and etymologies — with thesaurus-like lists of synonyms and antonyms, while supporting translations and pronunciation data for a very large number of languages. Readers can consult different language editions or switch to simplified interfaces such as the Simple English edition.
Typical content and structure
A Wiktionary entry for a headword is usually organized into sections by language. Each language section commonly includes:
- Part of speech (noun, verb, adjective, etc.) and one or more concise definitions;
- Pronunciation guide, using phonetic scripts and often audio files;
- Etymology describing the word's origin and historical development;
- Translations of each sense into other languages;
- Synonyms, antonyms and related terms, serving the thesaurus function;
- Usage notes and examples showing the word in context.
Entries can also include inflections, regional labels, quotations, and links to related pages within the site.
History and governance
The first Wiktionary pages appeared as an independent project when contributors adapted the wiki model to lexicography. It is hosted and formally supported by the Wikimedia Foundation, the nonprofit organization that also oversees other collaborative projects such as Wikipedia. Like most wiki-based projects, Wiktionary relies on an open-editing process: anyone may propose or edit entries, subject to project policies and community review. Information about the nature of wikis in general is available through resources about the wiki model, while the project's stewardship and hosting are described by the Wikimedia Foundation.
Uses, audience and examples
Wiktionary is used by learners, translators, writers and general readers who need quick access to word meanings across languages. Language teachers and students may find the translations and usage examples helpful; lexicographers and natural language technologists sometimes use the openly licensed data for research and computational projects. Because entries are editable, the project can grow quickly and cover specialized or recent vocabulary that traditional dictionaries may not yet include.
Reliability, scope and differences from other resources
As an open-edit resource, Wiktionary's coverage is broad and variable: some entries are stub-like, while others are detailed and well-sourced. Users should evaluate individual entries critically and consult multiple sources for important or disputed details. The project differs from conventional single-language dictionaries in its explicit multilingual organization and from standalone thesauri in offering lexical information such as etymology and translations. It also provides simpler, reader-focused content in editions like Simple English, and aims to complement rather than replace professionally edited lexical references.
Notable features and access
Wiktionary's strengths include open licensing, a multilingual scope, and the possibility to include audio pronunciations and machine-readable data. The site serves millions of entries across many language editions and is linked to other Wikimedia projects; its open format allows reuse under free licenses. For introductions to thesaurus-style resources and parallel features, readers can consult articles about the thesaurus. Further project documentation and help pages are maintained by the community and can be reached from the main site interface.
Small note: the project continues to evolve with contributions from volunteers worldwide, and its content and structure reflect ongoing community decisions and editorial practices.