Definition of thesaurus
plural thesauri
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\thi-ˈsȯr-ˌī, -ˌē\
or thesauruses
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\thi-ˈsȯr-ə-səz\
1 a
: a book of words or of information about a particular field or set of concepts;
especially
: a book of words and their synonyms
b
: a list of subject headings or descriptors usually with a cross-reference system for use in the organization of a collection of documents for reference and retrieval
2
: treasury, storehouse
