Definitions from Wiktionary (thesaurus)

▸ noun:  A publication that provides synonyms (and sometimes antonyms and other semantic relations) for the words of a given language.
▸ noun:  (archaic) A dictionary or encyclopedia.
▸ noun:  (information science) A hierarchy of subject headings: canonical titles of themes and topics, the titles serving as search keys.
▸ Also see thesaurus

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