Added 9 October 2026
thesaurus
/θɪˈsɔːɹəs/ noun
Latin root: thēsaurus Wiktionary
noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about thesaurus at Wordnik → Where our words come from →
- A book containing a classified list of synonyms.
Origin
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.
From Wiktionary, via Kaikki.org (CC BY-SA)