thə̇ˈsȯrəs noun
( plural thesau·ri -ˌrī ; or thesauruses )
Etymology: New Latin, from Latin, treasure, store, collection, from Greek thēsauros
1.
a. : a book containing a store of words or of information about a particular field or set of concepts ; specifically : a dictionary of synonyms
b. : a collection of concepts or words constituting the contents of a thesaurus
must employ only the thesaurus of Chinese rhetoric — H.H.Hart
indicated by … use of such terms as ostensible, emulative, conspicuous, and the rest of his beautifully ironic thesaurus — David Riesman
2. : treasury , storehouse