touchstone

American  

[tuhch-stohn] / ˈtʌtʃˌstoʊn /

noun

1. a test or criterion for the qualities of a thing.

   Synonyms:

   pattern, model, measure, standard

2. a black siliceous stone formerly used to test the purity of gold and silver by the color of the streak produced on it by rubbing it with either metal.

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touchstone British  

/ ˈtʌtʃˌstəʊn /

noun

1. a criterion or standard by which judgment is made

2. a hard dark siliceous stone, such as basalt or jasper, that is used to test the quality of gold and silver from the colour of the streak they produce on it

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Etymology

Origin of touchstone

First recorded in 1475–85; touch + stone

Example Sentences

The film is a generational touchstone, from the importance of relationships, self-sacrifice and doing what is right, to the consequences of concentrated wealth and greed.

From The Wall Street Journal • Mar. 25, 2026

The book was a touchstone in her own life, because she admired its heroine’s courage even if she never had the courage to emulate it.

From The Wall Street Journal • Mar. 12, 2026

Moira was my touchstone as I struggled with the reality of an unusually transient life, having lived in 29 homes by the age of 46.

From Los Angeles Times • Feb. 5, 2026

Founded by storyteller Anant Pai after he noticed children on a quiz show knew more about Greek gods than their own mythological heroes, ACK quickly became a cultural touchstone.

From Barron's • Feb. 1, 2026

The person who distrusts himself has no touchstone for reality—for this touchstone can be only oneself.

From "The Fire Next Time" by James Baldwin

Related Words

• barometer
• criterion