tunnel

US /ˈtʌnəl/

UK /'tʌnl/

B1

adjective

  • As if looking in a long hole

noun

  • Passage under the ground, often for cars or trains
  • An underground passage.
  • An underground passageway, especially one built for vehicles or trains.

verb

  • To dig a hole from one side to another

other

  • To make a tunnel.

other

  • To dig a tunnel through something.

Examples

A service tunnel runs between the two buildings.

a wind tunnel for aerodynamic experiments