n.
1.a passageway through or under something, usually underground (especially one for trains or cars)
2.a hole in the ground made by an animal for shelter tunnel v.
1.move through by or as by digging
2.force a way through
Idiom of the Day
pay (someone) a compliment
to compliment someone, to give someone a compliment
My supervisor paid me a compliment for the work that I was doing.