1. (

• tunnel

) a passageway through or under something, usually underground (especially one for trains or cars); "the tunnel reduced congestion at that intersection" ;

2. (

• burrow ,
• tunnel

) a hole made by an animal, usually for shelter ;

1. (

• burrow ,
• tunnel

) move through by or as by digging; "burrow through the forest" ;

2. (

• tunnel

) force a way through ;