Word.ws English Dictionary

thesauri

thesauri is the plural of thesaurus.

Meaning of thesaurus

Noun

thesaurus (plural thesauri or thesauruses)

  1. A publication that provides synonyms (and sometimes antonyms and other semantic relations) for the words of a given language.
    • "Roget" is the leading brand name for a print English thesaurus that lists words under general concepts rather than just close synonyms.
  2. (archaic) A dictionary or encyclopedia.
  3. A hierarchy of subject headings: canonical titles of themes and topics, the titles serving as search keys.

Questions about thesauri

What is thesauri the plural of?
Thesauri is the plural of thesaurus.

Words near thesauri in the dictionary

  1. thersites
  2. thersitical
  3. thesaural
  4. thesaurer
  5. thesaurers
  6. thesauri
  7. thesauric
  8. thesaurismosis
  9. thesaurismotic
  10. thesaurization
  11. thesaurize

Source and license

Adapted from Wiktionary: thesauri (page history and authors); thesaurus (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-NaomiAmethyst-thesauri.wav.

Cite this entry: “thesauri.” Word.ws, https://word.ws/thesauri. Based on Wiktionary, CC BY-SA 4.0.