A dictionary is a listing of lexemes from the lexicon of one or more specific languages, often arranged alphabetically, which may include information on definitions, usage, etymologies, pronunciations, translation, etc. It is a lexicographical reference that shows inter-relationships among the data.
An encyclopedia or encyclopaedia is a reference work or compendium providing summaries of knowledge, either general or special, in a particular field or discipline. Encyclopedias are divided into articles or entries that are arranged alphabetically by article name or by thematic categories, or else are hyperlinked and searchable. Encyclopedia entries are longer and more detailed than those in most dictionaries. Generally speaking, encyclopedia articles focus on factual information concerning the subject named in the article's title; this is unlike dictionary entries, which focus on linguistic information about words, such as their etymology, meaning, pronunciation, use, and grammatical forms.
The Oxford English Dictionary (OED) is the principal historical dictionary of the English language, published by Oxford University Press (OUP), a University of Oxford publishing house. The dictionary, which published its first edition in 1884, traces the historical development of the English language, providing a comprehensive resource to scholars and academic researchers, and provides ongoing descriptions of English language usage in its variations around the world.
A thesaurus, sometimes called a synonym dictionary or dictionary of synonyms, is a reference work which arranges words by their meanings, sometimes as a hierarchy of broader and narrower terms, sometimes simply as lists of synonyms and antonyms. They are often used by writers to help find the best word to express an idea:
...to find the word, or words, by which [an] idea may be most fitly and aptly expressed
Webster's Dictionary is any of the English language dictionaries edited in the early 19th century by Noah Webster (1758–1843), an American lexicographer, as well as numerous related or unrelated dictionaries that have adopted the Webster's name in his honor. "Webster's" has since become a genericized trademark in the United States for English dictionaries, and is widely used in dictionary titles.
Merriam-Webster, Incorporated is an American company that publishes reference books and is mostly known for its dictionaries. It is the oldest dictionary publisher in the United States.
The Concise Oxford English Dictionary is one of the best-known of the 'smaller' Oxford dictionaries. The latest edition contains over 240,000 entries and 1,728 pages. Its 12th edition, published in 2011, is used by both the United Nations (UN) and NATO as the current authority for spellings in documents in English for international use. It is available as an e-book for a variety of handheld device platforms. In addition to providing information for general use, it documents local variations such as United States and United Kingdom usage.
The Shorter Oxford English Dictionary (SOED) is an English language dictionary published by the Oxford University Press. The SOED is a two-volume abridgement of the twenty-volume Oxford English Dictionary (OED).
The Oxford Advanced Learner's Dictionary (OALD) was the first advanced learner's dictionary of English. It was first published in 1948. It is the largest English-language dictionary from Oxford University Press aimed at a non-native audience. Users with a more linguistic interest, requiring etymologies or copious references, usually prefer the Concise Oxford English Dictionary, or indeed the comprehensive Oxford English Dictionary, or other dictionaries aimed at speakers of English with native-level competence.
Japanese dictionaries have a history that began over 1300 years ago when Japanese Buddhist priests, who wanted to understand Chinese sutras, adapted Chinese character dictionaries. Present-day Japanese lexicographers are exploring computerized editing and electronic dictionaries. According to Nakao Keisuke (中尾啓介):
It has often been said that dictionary publishing in Japan is active and prosperous, that Japanese people are well provided for with reference tools, and that lexicography here, in practice as well as in research, has produced a number of valuable reference books together with voluminous academic studies. (1998:35)
Lexico was a dictionary website that provided a collection of English and Spanish dictionaries produced by Oxford University Press (OUP), the publishing house of the University of Oxford. While the dictionary content on Lexico came from OUP, this website was operated by Dictionary.com, whose eponymous website hosts dictionaries by other publishers such as Random House. The website was closed and redirected to Dictionary.com on 26 August 2022.
The English Dialect Dictionary (EDD) is the most comprehensive dictionary of English dialects ever published, compiled by the Yorkshire dialectologist Joseph Wright (1855–1930), with strong support by a team and his wife Elizabeth Mary Wright (1863–1958). The time of dialect use covered is, by and large, the Late Modern English period (1700–1903), but given Wright's historical interest, many entries contain information on etymological precursors of dialect words in centuries as far back as Old English and Middle English. Wright had hundreds of informants ("correspondents") and borrowed from thousands of written sources, mainly glossaries published by the English Dialect Society in the later 19th century, but also many literary texts written in dialect. In contrast to most of his sources, Wright pursued a scholarly linguistic method, providing full evidence of his sources and antedating modes of grammatical analysis of the 20th century. The contents of the EDD's nearly 80.000 entries were generally ignored during the 20th century but were made accessible by the interface of EDD Online, the achievement of an Innsbruck University research project first published in 2012 and repeatedly revised since.
The Longman Dictionary of Contemporary English (LDOCE), first published by Longman in 1978, is an advanced learner's dictionary, providing definitions using a restricted vocabulary, helping non-native English speakers understand meanings easily. It is available in four configurations:
The Oxford Dictionary of English (ODE) is a single-volume English dictionary published by Oxford University Press, first published in 1998 as The New Oxford Dictionary of English (NODE). The word "new" was dropped from the title with the Second Edition in 2003. The dictionary is not based on the Oxford English Dictionary (OED) – it is a separate dictionary which strives to represent faithfully the current usage of English words. The Revised Second Edition contains 355,000 words, phrases, and definitions, including biographical references and thousands of encyclopaedic entries. The Third Edition was published in August 2010, with some new words, including "vuvuzela".
Macmillan English Dictionary for Advanced Learners, also known as MEDAL, is an advanced learner's dictionary first published in 2002 by Macmillan Education. It shares most of the features of this type of dictionary: it provides definitions in simple language, using a controlled defining vocabulary; most words have example sentences to illustrate how they are typically used; and information is given about how words combine grammatically or in collocations. MEDAL also introduced a number of innovations. These include:
The history of Scottish Gaelic dictionaries goes back to the early 17th century. The high-point of Gaelic dictionary production was in the first half of the 19th century, as yet unrivalled even by modern developments in the late 20th and early 21st century. The majority of dictionaries published to date have been Gaelic to English dictionaries.
Christian Janet Kay was Emeritus Professor of English Language and Honorary Professorial Research Fellow in English Language and Linguistics at the University of Glasgow. She was an editor, with her mentor Michael Samuels, of the world's largest and first historical thesaurus, the Historical Thesaurus of English, first published in 2009 as the Historical Thesaurus of the Oxford English Dictionary (HTOED), a project to which she dedicated 40 years.
A historical dictionary or dictionary on historical principles is a dictionary which deals not only with the latterday meanings of words but also the historical development of their forms and meanings. It may also describe the vocabulary of an earlier stage of a language's development without covering present-day usage at all. A historical dictionary is primarily of interest to scholars of language, but may also be used as a general dictionary.
Marc Alexander is Professor of English Linguistics at the University of Glasgow, and Director of the Historical Thesaurus of English. His research is on the semantic development of English, particularly focusing on the relationships between language, culture, and history. As the Chief Editor of the Thesaurus, he was a recipient—as part of the University of Glasgow—of the Queen’s Anniversary Prize for Higher Education in 2017. He was awarded a Philip Leverhulme Prize of £100,000 for his linguistic research in 2019.
