Longman Dictionary of Contemporary English homepage

Date: 1800-1900
Language: Latin
Origin: 'treasure, collection', from Greek thesauros

thesaurus

 noun
     
Related topics: Linguistics
the‧sau‧rus plural thesauruses or thesauri [countable]
SL a book in which words are put into groups with other words that have similar meanings
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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