A thesaurus is a reference work that lists words grouped together according to similarity of meaning (containing synonyms and sometimes antonyms), in contrast to a
dictionary, which contains definitions and pronunciations.
The largest thesaurus in the
world is the Historical Thesaurus of the Oxford English
Dictionary, which contains more than 920,000 entries.
Girl at library: Excuse me, where is the thesaurus found here?
Librarian: It's at the "reference" or the "
non-fiction" section.
Girl: OK, thank you~