A vessel with a broad mouth at one end, a pipe or tube at the other, for conveying liquor, fluids, etc., into casks, bottles, or other vessels; a funnel.
The opening of a chimney for the passage of smoke; a flue; a funnel.
An artificial passage or archway for conducting canals or railroads under elevated ground, for the formation of roads under rivers or canals, and the construction of sewers, drains, and the like.
A level passage driven across the measures, or at right angles to veins which it is desired to reach; -- distinguished from the drift, or gangway, which is led along the vein when reached by the tunnel.
To form into a tunnel, or funnel, or to form like a tunnel; as, to tunnel fibrous plants into nests.
To catch in a tunnel net.
To make an opening, or a passageway, through or under; as, to tunnel a mountain; to tunnel a river.
No matter what you're going through, there's a light at the end of the tunnel and it may seem hard to get to it but you can do it and just keep working towards it and you'll find the positive side of things. Demi Lovato
Wherever my story takes me, however dark and difficult the theme, there is always some hope and redemption, not because readers like happy endings, but because I am an optimist at heart. I know the sun will rise in the morning, that there is a light at the end of every tunnel. Michael Morpurgo
The thing about a hero, is even when it doesn't look like there's a light at the end of the tunnel, he's going to keep digging, he's going to keep trying to do right and make up for what's gone before, just because that's who he is. Joss Whedon
When a train goes through a tunnel and it gets dark, you don't throw away the ticket and jump off. You sit still and trust the engineer. Corrie Ten Boom