Simple Definition of touchstone

from our Learner's Dictionary

touchstone

noun

plural touchstones
: something that is used to make judgments about the quality of other things
Good service is one touchstone of a first-class restaurant.

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“Touchstone.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/touchstone. Accessed 22 Jun. 2026.

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