1. the process of digging or boring a tunnel through or under something
2. the phenomenon in quantum mechanics where particles pass through energy barriers
Usage: physics

1. present participle of tunnel: digging or boring a passage through or under something

Examples

• The tunneling project under the river will take three years to complete.
• Workers are tunneling through the mountain to build the new highway.
• The company specializes in tunneling for subway construction.
• Quantum tunneling allows electrons to pass through barriers in semiconductors.
• The miners have been tunneling for weeks to reach the coal deposit.
• Tunneling beneath the city requires careful planning to avoid utilities.