Added 9 October 2026 touchstone /ˈtʌt͡ʃstəʊn/ noun Categories: LanguageRare Words noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about touchstone at Wordnik → Where our words come from → A basis for comparison; a reference point against which other things can be evaluated. the schools comply with federal standards Origin From touch + stone. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: criterionstandardmeasurebedrockcornerstonekeystonecentrepiecestakeyardsticklynchpinedgetouch Back to today's word