Plural of thesaurus
irregular plural
The plural of thesaurus is thesauri or thesauruses.
Forms of thesaurus
| Singular | thesaurus /θɪˈsɔːɹəs/ |
|---|---|
| Plural | thesauri thesauruses |
| Countable | countable |
Thesauri and thesauruses in a sentence
- I had taken a seat across from an old, shaggy-haired, warlocky fellow with several large thesauruses stacked in front of him.2015, J. C. Hallman, B & Me: A True Story of Literary Arousal, New York, N.Y.: Simon & Schuster, →ISBN, pages 272–273. From the entry warlocky
Meaning of thesaurus
- noun A publication that provides synonyms (and sometimes antonyms and other semantic relations) for the words of a given language.
- noun A dictionary or encyclopedia.
- noun A hierarchy of subject headings: canonical titles of themes and topics, the titles serving as search keys.
Nouns ending in -us: plural -i
Questions about the plural of thesaurus
- What is the plural of thesaurus?
- The plural of thesaurus is thesauri or thesauruses.
- Which is correct, thesauri or thesauruses?
- Both are used. thesauri is the more common of the two in English writing.
- Is thesaurus countable?
- Thesaurus is a countable noun.
Source and license
Adapted from Wiktionary: thesaurus (page history and authors) and the entries of its forms. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws left out forms marked obsolete, archaic, rare or dialectal and added the examples. Wiktionary data of 2026-09-02.
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Cite this page: “Plural of thesaurus.” Word.ws, https://word.ws/plural/thesaurus. Based on Wiktionary, CC BY-SA 4.0.