Question

$\bf\red{what\:is\: thesaurus}$​

Answer 1

Answer:

A thesaurus (plural thesauri or thesauruses) or synonym dictionary is a reference work for finding synonyms and sometimes antonyms of words. They are often used by writers to help find the best word to express an idea: ...to find the word, or words, by which [an] idea may be most fitly and aptly expressed

Answer 2

Thesaurus is a book of words or of information about a particular field or set of concepts.