1
- an artificial underground passage, especially one built through a hill or under a building, road, or river人工地下通道（尤指隧道、地道、坑道）。
1.1
- an underground passage dug by a burrowing animal（动物）洞穴通道。
1.2
- in sing. a passage in a sports stadium by which players enter or leave the field运动场运动员通道。
2
- short for WIND TUNNEL (in sense 1).WIND TUNNEL （义项1）的简称。
3
- a long, half-cylindrical enclosure used to protect plants, typically made of clear plastic stretched over hoops（尤指用透明塑料所作的, 套在箍圈外以保护植物的）套管。
(tunnelled, tunnelling; <美> tunneled, tunneling)
1
- no obj., with adverbial of direction dig or force a passage underground or through something挖地道, 打开通道：
he tunnelled under the fence
他在篱笆下面挖了个地道
(tunnel one's way) the insect tunnels its way out of the plant.
昆虫从植物中打洞钻了出来。
2
- no obj. Physics (of a particle) pass through a potential barrier【物理】（粒子）穿透势垒, 隧（道贯）穿。
短语
light at the end of the tunnel
- 见
LIGHT1 .
派生词
tunneller
noun词源
late Middle English （in the senses 'tunnel-net' and 'flue of a chimney'）： from Old French tonel, diminutive of tonne 'cask'. Sense 1 of the noun dates from the mid 18th cent.