tun·nel1 /ˈtʌnl/ ●●● W3 noun [countableC] 1 TTa passage that has been dug under the ground for cars, trains etc to go through 〔汽车、火车等通行的〕隧道 the Channel Tunnel (=between England and France) 〔英吉利〕海峡隧道
2. HBAHOLEa passage under the ground that animals have dug to live in 〔动物的〕洞穴通道
n COLLOCATIONSADJECTIVES/NOUN + tunnel a two-mile/1500-foot-long etc tunnelA 250-metre-long tunnel provides access to all parts of the development.
a dark tunnelHe peered uneasily down the dark tunnel at the end of the platform.
a narrow tunnelShe ran down the narrow tunnel leading to the exit.
an underground tunnelThe prisoners escaped through an underground tunnel.
a rail/railway tunnelthe 15km long Gotthard railway tunnel
a road tunnela road tunnel through the mountains
the Channel Tunnel (=the tunnel under the sea between England and France)They went by train via the Channel Tunnel.
phrasesthe roof of a tunnelThe roof of the tunnel was a foot above his head.
the entrance to a tunnel/tunnel entranceTo the right was the entrance to a second tunnel.
verbsdig a tunnelBurglars had dug a tunnel under the building in an attempted raid.
build a tunnelThe contractors will start building the tunnel next month.
a tunnel leads somewhereThe Greenwich Foot Tunnel leads under the River Thames.