A dictionary is a listing of words or lexemes—typically base forms—from the lexicon of one or more specific languages, often arranged alphabetically (or by consonantal root for Semitic languages or radical and stroke for logographic languages), which may include information on definitions, usage, etymologies, pronunciations, translation, etc.Webster's New World College Dictionary, Fourth Edition, 2002 It is a lexicographical reference that shows inter-relationships among the data.

A broad distinction is made between general and specialized dictionaries. Specialized dictionaries include words in specialist fields, rather than a comprehensive range of words in the language. Lexical items that describe concepts in specific fields are usually called terms instead of words, although there is no consensus whether lexicology and terminology are two different fields of study. In theory, general dictionaries are supposed to be semasiological, mapping word to definition, while specialized dictionaries are supposed to be onomasiological, first identifying concepts and then establishing the terms used to designate them. In practice, the two approaches are used for both types.A Practical Guide to Lexicography, Sterkenburg 2003, pp. 155–157 There are other types of dictionaries that do not fit neatly into the above distinction, for instance bilingual (translation) dictionaries, dictionaries of synonyms (thesauri), and rhyming dictionaries. The word dictionary (unqualified) is usually understood to refer to a general purpose monolingual dictionary.A Practical Guide to Lexicography, Sterkenburg 2003, pp. 3–4

There is also a contrast between prescriptive or descriptive dictionaries; the former reflect what is seen as correct use of the language while the latter reflect recorded actual use. Stylistic indications (e.g. "informal" or "vulgar") in many modern dictionaries are also considered by some to be less than objectively descriptive.A Practical Guide to Lexicography, Sterkenburg 2003, p. 7

The first recorded dictionaries date back to Sumerian times around 2300 BCE, in the form of bilingual dictionaries, and the oldest surviving monolingual dictionaries are Chinese dictionaries . The first purely English alphabetical dictionary was A Table Alphabeticall, written in 1604, and monolingual dictionaries in other languages also began appearing in Europe at around this time. The systematic study of dictionaries as objects of scientific interest arose as a 20th-century enterprise, called lexicography, and largely initiated by Ladislav Zgusta. The birth of the new discipline was not without controversy, with the practical dictionary-makers being sometimes accused by others of having an "astonishing lack of method and critical self-reflection".

History

The oldest known dictionaries were cuneiform tablets with bilingual Sumerian–Akkadian wordlists, discovered in Ebla (modern Syria) and dated to roughly 2300 BCE, the time of the Akkadian Empire. The early 2nd millennium BCE Urra=hubullu glossary is the canonical Babylonian version of such bilingual Sumerian wordlists. A Chinese dictionary, the Erya, is the earliest surviving monolingual dictionary; some sources cite the Shizhoupian (probably compiled sometime between 700 BCE and 200 BCE, possibly earlier) as a "dictionary", although modern scholarship considers it a calligraphic compendium of Chinese characters from Zhou dynasty bronzes. Philitas of Cos (fl. 4th century BCE) wrote a pioneering vocabulary Disorderly Words (Ἄτακτοι γλῶσσαι, ) which explained the meanings of rare Homeric and other literary words, words from local dialects, and technical terms. Apollonius the Sophist (fl. 1st century CE) wrote the oldest surviving Homeric lexicon. The first Sanskrit dictionary, the Amarakośa, was written by Amarasimha . Written in verse, it listed around 10,000 words. According to the , the first Japanese dictionary was the long-lost 682 CE Niina glossary of Chinese characters. Al-Khalil ibn Ahmad al-Farahidi's 8th century Kitab al-'Ayn is considered the first dictionary of Arabic.Sellheim, R., "al-K̲h̲alīl b. Aḥmad", in: Encyclopaedia of Islam, Second Edition, Edited by: P. Bearman, Th. Bianquis, C.E. Bosworth, E. van Donzel, W.P. Heinrichs. Consulted online on 4 June 2023 The oldest existing Japanese dictionary, the Tenrei Banshō Meigi, was also a glossary of written Chinese. In Frahang-i Pahlavig, Aramaic heterograms are listed together with their translation in the Middle Persian language and phonetic transcription in the Pazend alphabet. A 9th-century CE Irish dictionary, Sanas Cormaic, contained etymologies and explanations of over 1,400 Irish words. In the 12th century, The Karakhanid-Turkic scholar Mahmud Kashgari finished his work "Divan-u Lügat'it Türk", a dictionary about the Turkic dialects, but especially Karakhanid Turkic. His work contains about 7500 to 8000 words and it was written to teach non-Turkic Muslims, especially the Abbasid Arabs, the Turkic language.Besim Atalay, Divanü Lügat-it Türk Dizini, TTK Basımevi, Ankara, 1986 Al-Zamakhshari wrote a small Arabic dictionary called "Muḳaddimetü'l-edeb" for the Turkic-Khwarazm ruler Atsiz.Zeki Velidi Togan, Zimahşeri'nin Doğu Türkçesi İle Mukaddimetül Edeb'i In the 14th century, the Codex Cumanicus was completed, and it served as a dictionary of the Cuman-Turkic language. In Mamluk Egypt, Ebû Hayyân el-Endelüsî completed his work "Kitâbü'l-İdrâk li-lisâni'l-Etrâk", a dictionary of the Kipchak and Turcoman languages spoken in Egypt and the Levant.Ahmet Caferoğlu, Kitab Al Idrak Li Lisan Al Atrak, 1931 A dictionary called "Bahşayiş Lügati", written in old Anatolian Turkish, served also as a dictionary between Oghuz Turkish, Arabic and Persian. But it is not clear who wrote the dictionary or in which century exactly it was published. It was written in old Anatolian Turkish from the Seljuk period and not the late medieval Ottoman period.Bahşāyiş Bin Çalıça, Bahşayiş Lügati: Hazırlayan: Fikret TURAN, Ankara 2017, In India around 1320, Amir Khusro compiled the Khaliq-e-bari, which mainly dealt with Hindustani and Persian words.

Arabic dictionaries were compiled between the 8th and 14th centuries CE, organizing words in rhyme order (by the last syllable), by alphabetical order of the radicals, or according to the alphabetical order of the first letter (the system used in modern European language dictionaries). The modern system was mainly used in specialist dictionaries, such as those of terms from the Qur'an and hadith, while most general use dictionaries, such as the Lisan al-`Arab (13th century, still the best-known large-scale dictionary of Arabic) and al-Qamus al-Muhit (14th century) listed words in the alphabetical order of the radicals. The Qamus al-Muhit is the first handy dictionary in Arabic, which includes only words and their definitions, eliminating the supporting examples used in such dictionaries as the Lisan and the Oxford English Dictionary."Ḳāmūs", J. Eckmann, Encyclopaedia of Islam, 2nd ed., Brill

In medieval Europe, glossaries with equivalents for Latin words in vernacular or simpler Latin were in use (e.g. the Leiden Glossary). The Catholicon (1287) by Johannes Balbus, a large grammatical work with an alphabetical lexicon, was widely adopted. It served as the basis for several bilingual dictionaries and was one of the earliest books (in 1460) to be printed. In 1502 Ambrogio Calepino's Dictionarium was published, originally a monolingual Latin dictionary, which over the course of the 16th century was enlarged to become a multilingual glossary. In 1532 Robert Estienne published the Thesaurus linguae latinae and in 1572 his son Henri Estienne published the Thesaurus linguae graecae, which served up to the 19th century as the basis of Greek lexicography. The first monolingual Spanish dictionary written was Sebastián Covarrubias's Tesoro de la lengua castellana o española, published in 1611 in Madrid, Spain.Tesoro de la lengua castellana o española, edición integral e ilustrada de Ignacio Arellano y Rafael Zafra, Madrid, Iberoamericana-Vervuert, 2006, pg. XLIX. In 1612 the first edition of the Vocabolario degli Accademici della Crusca, for Italian, was published. It served as the model for similar works in French and English. In 1690 in Rotterdam was published, posthumously, the Dictionnaire Universel by Antoine Furetière for French. In 1694 appeared the first edition of the (still published, with the ninth edition not complete ). Between 1712 and 1721 was published the Vocabulario portughez e latino written by Raphael Bluteau. The Royal Spanish Academy published the first edition of the (still published, with a new edition about every decade) in 1780; their Diccionario de Autoridades, which included quotes taken from literary works, was published in 1726. The Totius Latinitatis lexicon by Egidio Forcellini was firstly published in 1777; it has formed the basis of all similar works that have since been published.

The first edition of A Greek-English Lexicon by Henry George Liddell and Robert Scott appeared in 1843; this work remained the basic dictionary of Greek until the end of the 20th century. And in 1858 was published the first volume of the Deutsches Wörterbuch by the Brothers Grimm; the work was completed in 1961. Between 1861 and 1874 was published the Dizionario della lingua italiana by Niccolò Tommaseo. Between 1862 and 1874 was published the six volumes of A magyar nyelv szótára (Dictionary of Hungarian Language) by Gergely Czuczor and János Fogarasi. Émile Littré published the between 1863 and 1872. In the same year 1863 appeared the first volume of the Woordenboek der Nederlandsche Taal which was completed in 1998. Also in 1863 Vladimir Ivanovich Dahl published the Explanatory Dictionary of the Living Great Russian Language. The Duden dictionary dates back to 1880, and is currently the prescriptive source for the spelling of German. The decision to start work on the Svenska Akademiens ordbok was taken in 1787.

English dictionaries in Britain The earliest dictionaries in the English language were glossaries of French, Spanish or Latin words along with their definitions in English. The word "dictionary" was invented by an Englishman called John of Garland in 1220 he had written a book Dictionarius to help with Latin "diction".Mark Forsyth. The etymologicon. // Icon Books Ltd. London N79DP, 2011. p. 128 An early non-alphabetical list of 8000 English words was the Elementarie, created by Richard Mulcaster in 1582.A Brief History of English Lexicography , Peter Erdmann and See-Young Cho, Technische Universität Berlin, 1999.

The first purely English alphabetical dictionary was A Table Alphabeticall, written by English schoolteacher Robert Cawdrey in 1604. The only surviving copy is found at the Bodleian Library in Oxford. This dictionary, and the many imitators which followed it, was seen as unreliable and nowhere near definitive. Philip Stanhope, 4th Earl of Chesterfield was still lamenting in 1754, 150 years after Cawdrey's publication, that it is "a sort of disgrace to our nation, that hitherto we have had no… standard of our language; our dictionaries at present being more properly what our neighbors the Dutch and the Germans call theirs, word-books, than dictionaries in the superior sense of that title."Jack Lynch, "How Johnson's Dictionary Became the First Dictionary" (delivered 25 August 2005 at the Johnson and the English Language conference, Birmingham) Retrieved 12 July 2008,