From Longman Dictionary of Contemporary Englishthesaurusthe‧sau‧rus /θɪˈsɔːrəs/ noun (plural thesauruses or thesauri /-raɪ/) [countable] SLa book in which words are put into groups with other words that have similar meanings
Examples from the Corpus
thesaurus• In some cases, consulting a thesaurus will offer an alternative.• A thesaurus is normally tailored to meet the specifications of a particular application.• A thesaurus offers terms for individual concepts and shows the relationships between those terms.• A thesaurus was created by the pupils to use with the subject keys as an aid to searching the catalogue.• If you know how to use a standard dictionary and thesaurus, you can use the electronic edition.• Datasets are exhaustively indexed by subject, using a controlled vocabulary or thesaurus.Origin thesaurus (1800-1900) Latin “treasure, collection”, from Greek thesauros 