Pronunciation: /tʌtʃ.stoʊn/
noun a black siliceous stone related to flint, formerly used to test the purity of gold and silver by the streak left on the stone when rubbed by the metal
A1 A touchstone is a type of stone used to test the purity of gold.
A2 In literature, a touchstone is a standard or criterion by which something is judged.
B1 The scientific method can be considered a touchstone for evaluating the validity of research findings.
B2 For many people, honesty is a touchstone of a strong and healthy relationship.
C1 The principles of democracy serve as a touchstone for evaluating the legitimacy of political systems.
C2 The touchstone of a true leader is their ability to inspire and empower those around them.
formal The scientific method is often considered the touchstone of modern research.
informal For many music lovers, vinyl records are the touchstone of quality sound.
slang In skateboarding culture, landing a kickflip is the touchstone of skill.
figurative Honesty is the touchstone of a strong relationship.
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