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touchstone suggests a simple test of the authenticity or value of something intangible.

Parasmani (lit. 'Touchstone'), a 1963 Indian film.

TOUCHSTONE definition: a test or criterion for the qualities of a thing. See examples of touchstone used in a sentence.

touchstone (of/for something) something that provides a standard against which other things are compared and/or judged. Grammar was regarded as the touchstone of all language performance. He …

TOUCHSTONE definition: 1. an established standard or principle by which something is judged: 2. an established standard…. Learn more.

touchstone, n. & adj. meanings, etymology, pronunciation and more in the Oxford English Dictionary

Use the noun touchstone to describe a basis for comparison. For example, a filmmaker's touchstone might be her all-time favorite movie; she wants her movie to be that good or similar to it in some way.

touchstone (ˈtʌtʃˌstəʊn) n 1. a criterion or standard by which judgment is made

In a literal sense, a touchstone is a dark-colored stone, typically made of basalt or jasper, used to test the purity of gold or silver. By rubbing the metal against the touchstone and comparing the resulting …