# thesaurus
## English
### Etymology

16th century, borrowed from Latin thēsaurus, from Ancient Greek θησαυρός (thēsaurós, “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. Doublet of treasure.

### Pronunciation

* IPA: /θɪˈsɔːɹəs/
* Audio (Southern England):(file)
* Rhymes: -ɔːɹəs
* Hyphenation: the‧saur‧us

### Noun

thesaurus (plural thesauri or thesauruses)
* A publication that provides synonyms (and sometimes antonyms and other semantic relations) for the words of a given language.
    Synonym: synonymicon
    "Roget" is the leading brand name for a print English thesaurus that lists words under general concepts rather than just close synonyms.
** 2008 April 18, Charles Mcgrath, “The Keeper (See: Steward, Caretaker) of Synonyms”, in New York Times‎:As reference books go, the thesaurus has had a somewhat checkered history, in fact, and has probably occasioned as much bad writing as good.
* (archaic) A dictionary or encyclopedia.
* (information science) A hierarchy of subject headings: canonical titles of themes and topics, the titles serving as search keys.
    Coordinate terms: catalogue, controlled vocabulary, index

#### Derived terms

* metathesaurus
* thesaural
* thesauruslike

#### Translations
### See also

* ontology
* Wiktionary's thesaurus
* Appendix:Roget's thesaurus classification
* Appendix:Roget MICRA thesaurus
* Appendix:Moby Thesaurus II

### Further reading

* “thesaurus”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.
* “thesaurus”, in The Century Dictionary […], New York, N.Y.: The Century Co., 1911, →OCLC.
* OneLook Thesaurus in OneLook, 2023

## Latin
### Alternative forms

* thensaurus (pre-Classical)
* tēsaurus, tēsōrus (Low Latin)

### Etymology

From Ancient Greek θησαυρός (thēsaurós, “storehouse, treasure”).

### Pronunciation

* (Classical Latin) IPA: /tʰeːˈsau̯.rus/, [t̪ʰeːˈs̠äu̯rʊs̠]
* (modern Italianate Ecclesiastical) IPA: /teˈsau̯.rus/, [t̪eˈs̬äːu̯rus]

### Noun

thēsaurus m (genitive thēsaurī); second declension
* treasure, hoard
** Late 4th century, Jerome [et al.], transl., edited by Roger Gryson, Biblia Sacra: Iuxta Vulgatam Versionem (Vulgate), 5th edition, Stuttgart: Deutsche Bibelgesellschaft, published 2007, →ISBN, Danihelis 1:2:[…] et vasa intulit in domum thesauri dei sui" […] and he brought the vessels into the treasure house of his god."
* a dear friend, loved one
* a vault for treasure
* chest, strongbox
* repository, collection

#### Declension

Second-declension noun.

#### Derived terms

* thēsaurārius
* thēsaurensis
* thēsaurizātor
* thēsaurizō

#### Descendants

* → Albanian: thesar
* Catalan: tresor, → tesaurus
* → English: thesaurus
** → Welsh: thesawrws
* → French: thésaurus
* → German: Thesaurus
* Italian: tesauro, tesoro
* Old French: tresor
** Middle French: thresor
*** French: trésor
** Walloon: trezôr
** → Middle English: tresour
*** English: treasure
*** Scots: treisur
** → Esperanto: trezoro
** → German: Tresor
*** → Czech: trezor
*** → Serbo-Croatian: trèzōr/трѐзо̄р
** → Ido: trezoro
** → Ladino: trezoro
** → Occitan: tresaur
** → Welsh: trysor
* Old Galician-Portuguese: tesouro
** Galician: tesouro
** Portuguese: tesouro, tesoiro
* Piedmontese: tesòr
* → Portuguese: tesauro
* Romanian: tezaur
* Spanish: tesoro, → tesauro

### References

* “thesaurus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
* “thesaurus”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
* "thesaurus", in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
* thesaurus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.
* “thesaurus”, in Harry Thurston Peck, editor (1898), Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
* “thesaurus”, in William Smith et al., editor (1890), A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin

## Portuguese
### Etymology

Unadapted borrowing from Latin thesaurus.

### Pronunciation

* (Brazil) IPA: /teˈzaw.ɾus/ [teˈzaʊ̯.ɾus]
* (Brazil) IPA: /teˈzaw.ɾus/ [teˈzaʊ̯.ɾus]
** (Rio de Janeiro) IPA: /teˈzaw.ɾuʃ/ [teˈzaʊ̯.ɾuʃ]
* (Portugal) IPA: /tɨˈzaw.ɾuʃ/

### Noun

thesaurus m (plural thesauri or thesaurus)
* Alternative form of tesauro