tunnel

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♦ tun|nel /t'ʌnəl/ (tunnels tunnelling tunnelled)
in AM, use tunneling, tunneled
1 [N-COUNT] oft supp N
A tunnel is a long passage which has been made under the ground, usually through a hill or under the sea.
...two new railway tunnels through the Alps.
2 [VERB] V prep/adv
To tunnel somewhere means to make a tunnel there.
The rebels tunnelled out of a maximum security jail...
3
see also wind tunneltun|nel vi|sion
1 [N-UNCOUNT]
If you suffer from tunnel vision, you are unable to see things that are not straight in front of you.
2 [N-UNCOUNT]
If you say that someone has tunnel vision, you disapprove of them because they are concentrating completely on achieving a particular aim, and do not notice or consider all the different aspects of what they are doing.wind tun|nel /w'ɪnd tʌnəl/ (wind tunnels)
[N-COUNT]
A wind tunnel is a room or passage through which air can be made to flow at controlled speeds. Wind tunnels are used to test new equipment or machinery, especially cars and aeroplanes.

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