- an underground passage.
- a passageway, as for trains or automobiles, through or under an obstruction, as a city, mountain, river, harbor, or the like.
- an approximately horizontal gallery or corridor in a mine.
- the burrow of an animal.
- a funnel.
- to construct a passageway through or under: to tunnel a mountain.
- to make or excavate (a tunnel or underground passage): to tunnel a passage under a river.
- to move or proceed by or as if by boring a tunnel: The river tunneled its way through the mountain.
- to pierce or hollow out, as with tunnels.
- to make a tunnel or tunnels: to tunnel through the Alps.
- an underground passageway, esp one for trains or cars that passes under a mountain, river, or a congested urban area
- any passage or channel through or under something
- a dialect word for funnel
- the flue of a chimney
- to make or force (a way) through or under (something)
- to make or force a way (through or under something)