1. Plural of chunnel; undersea or underground tunnels, especially the Channel Tunnel connecting England and France.
Usage: informal; chiefly British; portmanteau of 'channel' and 'tunnel'

Examples

• The chunnels beneath the English Channel have revolutionized travel between Britain and continental Europe.
• Engineers designed the chunnels to withstand extreme pressure and water infiltration.
• Passengers can now cross the chunnels in under 30 minutes by train.
• The construction of chunnels required innovative drilling technology.
• Many tourists prefer traveling through the chunnels rather than taking ferries.