Dictionary and Thesaurus

Definition of Touchstone

• (n.) Lydian stone; basanite; -- so called because used to test the purity of gold and silver by the streak which is left upon the stone when it is rubbed by the metal. See Basanite.
• (n.) Any test or criterion by which the qualities of a thing are tried.

Synonyms of Touchstone

• Standard
• Criterion
• Measure

Antonyms of Touchstone

Homophones of Touchstone