In general usage, a thesaurus is a reference work that lists words grouped together according to similarity of meaning (containing synonyms and sometimes antonyms), in contrast to a dictionary, which provides definitions for words, and generally lists them in alphabetical order. The main purpose of such reference works for users "to find the word, or words, by which [an] idea may be most fitly and aptly expressed" – to quote Peter Mark Roget, architect of the best known thesaurus in the English language.Although including synonyms, a thesaurus should not be taken as a complete list of all the synonyms for a particular word. The entries are also designed for drawing distinctions between similar words and assisting in choosing exactly the right word. Unlike a dictionary, a thesaurus entry does not give the definition of words.
In library science and information science, thesauri have been widely used to specify domain models. Recently, thesauri have been implemented with Simple Knowledge Organization System (SKOS).
A publication, usually in the form of a book, that provides synonyms (and sometimes antonyms) for the words of a given language.
""Roget" is the leading brand name for a print English thesaurus that lists words under general concepts rather than just close synonyms."
A dictionary or encyclopedia.
A hierarchy of subject headings — canonic titles of themes and topics, the titles serving as search keys.
a book that lists words in groups of synonyms and related concepts.
a dictionary or encyclopedia.
A dictionary of synonyms.
A treasury or storehouse; hence, a repository, especially of knowledge; - often applied to a comprehensive work, like a dictionary or cyclopedia.
a book containing a classified list of synonyms
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