Thesaurus Definition
thĭ-sôrəs
thesauri, thesauruses
noun
thesauri, thesauruses
A treasury or storehouse.
Webster's New World
A book containing a store of words; specif., a book of synonyms and antonyms.
Webster's New World
A book of selected words or concepts, such as a specialized vocabulary of a particular field, as of medicine or music.
American Heritage
A categorized index of terms for use in information retrieval, as from a computer.
Webster's New World
(archaic) A dictionary or encyclopedia.
Wiktionary
Synonyms:
- synonym finder
- lexicon
- dictionary
- collection of words
- synonymy
- synonyms and antonyms
- glossary
Other Word Forms of Thesaurus
Noun
Singular:
thesaurus
Plural:
thesauri, thesaurusesOrigin of Thesaurus
-
16th century, from Latin thÄ“saurus, from Ancient Greek θησαυρός (thÄ“sauros, “storehouse, treasure"); its current English usage/meaning was established soon after the publication of Peter Roget's Thesaurus of English Words and Phrases in 1852
From Wiktionary
Latin thēsaurus treasury from Greek thēsauros
From American Heritage Dictionary of the English Language, 5th Edition
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