1. people who direct orchestras or other musical groups
2. materials that allow electricity, heat, or sound to pass through them easily
Usage: physics
3. people who collect tickets or fares on trains or buses

Examples

• The orchestra had three guest conductors this season.
• Famous conductors often travel around the world leading different symphonies.
• Metals like copper and silver are excellent electrical conductors.
• Heat conductors are used in cooking pans to distribute temperature evenly.
• The train conductor checked our tickets before we found our seats.
• Bus conductors used to be more common before automated fare systems.
• The conductor announced the next stop over the intercom.