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A thesaurus (pl.: thesauri or thesauruses), sometimes called a synonym dictionary or dictionary of synonyms, is a reference work which arranges words by their meanings (or in simpler terms, a book where one can find different words with similar meanings to other words), [1] [2] sometimes as a hierarchy of broader and narrower terms, sometimes simply as lists of synonyms and antonyms.
A thesaurus or synonym dictionary lists similar or related words; these are often, but not always, synonyms. [15] The word poecilonym is a rare synonym of the word synonym. It is not entered in most major dictionaries and is a curiosity or piece of trivia for being an autological word because of its meta quality as a synonym of synonym.
The synonyms are grouped into synsets with short definitions and usage examples. It can thus be seen as a combination and extension of a dictionary and thesaurus. While it is accessible to human users via a web browser, [2] its primary use is in automatic text analysis and artificial intelligence applications.
Google Dictionary is an online dictionary service of Google that can be accessed with the "define" operator and other similar phrases [note 1] in Google Search. [2] It is also available in Google Translate and as a Google Chrome extension. The dictionary content is licensed from Oxford University Press's Oxford Languages. [3]
Technically, a glossary is a kind of dictionary which is limited to the vocabulary of a particular specialty. For example, when defining the phrase "take two aspirin", a medical glossary might define only the word aspirin, whereas a dictionary would be more likely to define each word separately (take, two, and aspirin).
The primary content on Dictionary.com is a proprietary dictionary based on Random House Unabridged Dictionary, with editors for the site providing new and updated definitions. [2] [3] Supplementary content comes from the Collins English Dictionary, American Heritage Dictionary and others. [4] It is owned by IXL Learning. [5]
Frequently, in discussions, the word source is specifically used to mean one of these specific aspects of a source: The work itself (the article, book: "That book looks like a useful source for this article.") and works like it ("An obituary can be a useful biographical source", "A recent source is better than an old one")
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 ...