THESAURUS

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THESAURUS [Plurals: traditionally thesauri, more recently and less formally thesauruses].
1. A work of REFERENCE presented as a treasure house (Greek thēsaurós) of information about words, such as Thomas Cooper's bilingual dictionary, the Thesaurus Linguae Romanae et Britannicae (‘Thesaurus of the Roman and British Languages’, 1565).

2. A work of reference containing lists of associated, usually undefined, words (such as synonyms) arranged thematically, in the style of ROGET's THESAURUS of English Words and Phrases (1852).

3. A work of reference containing such lists but presented alphabetically, such as The New Roget's Thesaurus in Dictionary Form ( Putnam's, 1961) and The Oxford Thesaurus (1991).

4. In information technology, an alphabetic index list of key terms, through which information of a specialist nature can be retrieved from a database.

5. In word processing, a stored list of synonyms and antonyms, to be consulted in the preparation of texts, and provided as a service comparable to a spelling checker.

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