Touchstone

 1. Definition: A touchstone is a black stone used to test the purity of gold and silver by leaving a visible mark when rubbed against them.

Example in context: The jeweler used a touchstone to determine the authenticity of the gold necklace.

2. Definition: A touchstone can also refer to a standard or criterion used to judge or evaluate something.

Example in context: Honesty is often considered a touchstone of a person's character.

3. Definition: In literature, a touchstone can be a reference point or a work that is used to evaluate the quality or value of other works.

Example in context: Shakespeare's plays are often considered a touchstone for excellence in dramatic writing.

4. Definition: In a figurative sense, touchstone can mean a test or indicator of authenticity, genuineness, or quality.

Example in context: The ability to adapt to change is often seen as a touchstone of leadership.

5. Definition: Touchstone can also refer to a personal or intellectual benchmark against which one measures or compares oneself.

Example in context: As a musician, her touchstone is the great composers of the past.

These examples showcase different interpretations of touchstone, highlighting its usage in various contexts.