noun · a walled-in, canopied, or indoor corridor connecting different buildings or rooms

宫殿之间有长长的甬道相连接。

noun · a paved pathway, often located in the center of a courtyard or leading to a tomb

石砖铺成的甬道一直延伸到陵墓门口。

noun · an underground or enclosed passage

防空洞里有许多纵横交错的甬道。