thesaurus

[ thi-sawr-uh s ]
/ θɪˈsɔr əs /

noun, plural the·sau·rus·es, the·sau·ri [-sawr-ahy] /-ˈsɔr aɪ/.

a dictionary of synonyms and antonyms, such as the online Thesaurus.com.
any dictionary, encyclopedia, or other comprehensive reference book.
a storehouse, repository, or treasury.
Computers.
  1. an index to information stored in a computer, consisting of a comprehensive list of subjects concerning which information may be retrieved by using the proper key terms.
  2. a dictionary of synonyms and antonyms stored in memory for use in word processing.

Origin of thesaurus

1730–40; < Latin thēsaurus < Greek thēsaurós ‘treasure, treasury’

Example sentences from the Web for thesauruses

British Dictionary definitions for thesauruses

thesaurus
/ (θɪˈsɔːrəs) /

noun plural -ruses or -ri (-raɪ)

a book containing systematized lists of synonyms and related words
a dictionary of selected words or topics
rare a treasury

Word Origin for thesaurus

C18: from Latin, Greek: treasure