Type of site
|Created by||Oxford University Press|
Lexico is a website that provides a collection of dictionaries of English and Spanish produced by Oxford University Press (OUP), the publishing house of the University of Oxford. While the dictionaries on Lexico are made solely by OUP, the website is owned by Dictionary.com, whose eponymous website hosts dictionaries by other publishers such as Random House.
The dictionaries were previously hosted by OUP's own website, Oxford Dictionaries Online (ODO), later known as Oxford Living Dictionaries. The dictionaries' definitions appear in Google definition search, the Dictionary application on macOS, etc., licensed through Oxford Dictionaries API.  
In the 2000s, OUP allowed access to content of the Compact Oxford English Dictionary of Current English on a website called AskOxford.com.  In 2010, Oxford Dictionaries Online was launched under oxforddictionaries.com,  superseding the dictionary content of AskOxford.com. Buyers of the third edition of the Oxford Dictionary of English, also published in 2010, were granted a one-year subscription to the website's subscription content.  The website's English dictionaries incorporated content of the Oxford Dictionary of English, New Oxford American Dictionary, Oxford Thesaurus of English, and Oxford American Writer’s Thesaurus. It also provided a Spanish monolingual dictionary and bilingual dictionaries between English and several languages.  As of June 2014 [update], it was updated every three months. 
In 2014, OUP launched Oxford Global Languages, an initiative to build lexical resources (bilingual dictionaries) of the world's languages, starting with Zulu and Northern Sotho online dictionaries released in 2015.  In 2016, the free content of Oxford Dictionaries Online was rebranded as Oxford Living Dictionaries, and the subscription content as Oxford Dictionaries Premium. 
In June 2019, the free-of-charge dictionaries of English and Spanish were moved to Lexico.com, a collaboration between OUP and Dictionary.com, though with the lexicographic content continuing to be written solely by OUP staff. While the offer of the US English dictionary on Oxford Living Dictionaries was terminated upon the migration to Lexico except for words which the UK dictionary did not have entries for,   the US dictionary became fully available again on Lexico in early 2020.  "Lexico" was itself part of the former name of the company Dictionary.com, Lexico Publishing Group, LLC. 
In March 2020, the remaining Oxford Living Dictionaries websites, which hosted dictionaries made in the Global Languages programme, were closed. A statement from OUP said, "Rather than offering a dictionary website for every digitally under-resourced language, we will facilitate third parties to build products and services that best serve the needs of each individual language community. Our efforts will be focused on creating and providing the data that these third parties need."  At the time of the closure, they hosted dictionaries of Zulu, Northern Sotho, Malay, Urdu, Tswana, Indonesian, Romanian, Latvian, Swahili, Hindi, Tamil, Gujarati, Tatar, Xhosa, Southern Quechua, Tajik, Tok Pisin, Turkmen, Telugu, and Greek. 
The website of the Oxford English Dictionary described its difference from Oxford Dictionaries as follows:
The dictionary content in Oxford Dictionaries focuses on current English and includes modern meanings and uses of words. Where words have more than one meaning, the most important and common meanings in modern English are given first, and less common and more specialist or technical uses are listed below. The OED, on the other hand, is a historical dictionary and it forms a record of all the core words and meanings in English over more than 1,000 years, from Old English to the present day, and including many obsolete and historical terms. Meanings are ordered chronologically in the OED, according to when they were first recorded in English ... 
- "Oxford Dictionaries API". Oxford University Press. Retrieved 22 June 2019.
- Bell, Karissa (4 December 2015). "Why Siri showed a definition of b*tch that offended everyone". Mashable. Retrieved 22 June 2019.
- "AskOxford.com". Reference & User Services Quarterly. 44 (1): 40. 2004. JSTOR 20864286.
- "Oxford University Press Chooses PubFactory to Develop Oxford English Dictionary". PubFactory. 4 August 2010. Retrieved 11 June 2019.
- ""Vuvuzela," "staycation" among 2,000 words added to Oxford Dictionary". The Independent. 20 August 2010. Retrieved 11 June 2019.
- "Oxford Dictionaries content help". Oxford Dictionaries. Oxford University Press. Archived from the original on 27 August 2016.
- Harrison, Emma (19 June 2014). "Oxford dictionaries: Demise of the printed editions?". BBC News. Retrieved 11 June 2019.
- "Oxford Global Languages". Oxford Dictionaries. Oxford University Press. Retrieved 11 June 2019.
- "Help". Oxford Living Dictionaries. Oxford University Press. Archived from the original on 25 September 2016.
- "Lexico.com FAQS". Oxford Dictionaries. Oxford University Press. Archived from the original on 16 June 2019. Retrieved 11 June 2019.
- "About". Lexico. Archived from the original on 7 February 2020.
- "About". Lexico. Archived from the original on 17 February 2020. Retrieved 16 March 2020.
- "Amended and Restated Operating Agreement of Dictionary.com, LLC". U.S. Securities and Exchange Commission. 17 July 2008. Retrieved 14 October 2019.
- "The latest news about Oxford Global Languages". Oxford Languages. Oxford University Press. Archived from the original on 30 March 2020. Retrieved 30 March 2020.
- "Our dictionaries". Oxford Languages. Oxford University Press. Archived from the original on 28 March 2020. Retrieved 30 March 2020.
- "The OED and Oxford Dictionaries". Oxford English Dictionary. Oxford University Press. Archived from the original on 28 February 2018.