underground

Definition:
1. A secret group organized to overthrow a government or occupation force.
2. Electric underground railway.
3. Under the level of the ground.
4. Conducted with or marked by hidden aims or methods.
5. Used of independent armed resistance forces.
6. In or into hiding or secret operation.
7. Beneath the surface of the earth.

Use 'underground' in a sentence:

• 1. There was an Underground map above one of the windows and I counted the stops to West Hampstead.
• 2. I don't travel on the underground late at night.
• 3. Once, people used too much underground water.
• 4. France has carried out an underground nuclear explosion on Mururoa Atoll in the South Pacific.
• 5. Mud oozed from underground.
• 6. Coal is mined from underground.
• 7. Why not take the underground to the university?
• 8. Simon takes the underground.
• 9. Recently they have laid an underground pipeline.
• 10. Charlie is too young to take the underground alone.
• 11. After the violent clashes of 1981 they either went underground or left the country.
• 12. The best way is to take the underground.
• 13. There is an underground parking lot over there.
• 14. They are accused of organising and financing an underground youth movement.
• 15. The underground is ideal for getting to work in Milan.
• 16. An underground organization has claimed responsibility for the bomb explosion.
• 17. The plane hit so hard that one engine was buried 16 feet underground.
• 18. He crossed London by underground.
• 19. I've seen like harp players on the underground.
• 20. The train was trapped underground by a fire.
• 21. Water trickles through an underground grotto.
• 22. I also know that most plants use their underground roots to get water.
• 23. The investigators found that the underground pipes were badly corroded.
• 24. The day would come when many of us would have to go underground.
• 25. Bus routes and railways, both overground and underground, converged on the station.
• 26. There's a high-tech underground trash disposal system.
• 27. These US dollars were smuggled into the country during the war, to aid the underground.
• 28. There's an underground passageway that connects the five buildings.
• 29. You are advised to take the underground there.
• 30. Radioactive water had seeped into underground reservoirs.
• 31. I will go underground.
• 32. Part of it was one metre underground.
• 33. London Underground said it may have to axe 500 signalling jobs because of government cutbacks in its investment.
• 34. At its peak in the Thirties, Underground design and architecture was all of a piece.
• 35. He was a courier for the Polish underground and parachuted into Warsaw.
• 36. By 1997 or thereabouts Athens will have a new airport, plus the best underground railway in Europe.
• 37. The escaped prisoners were eventually trapped in an underground garage and recaptured.
• 38. The Chicago River flooded the city's underground tunnel system.
• 39. Solid low-level waste will be disposed of deep underground.
• 40. They found themselves in a vast underground chamber.
• 41. Rescuers found victims trapped several feet underground.
• 42. If you want to get around London fast, the Underground is your best bet.
• 43. The miners were trapped deep underground.
• 44. Police busted an underground network of illegal sports gambling.
• 45. I always travel by underground.
• 46. A London Underground spokesman defended the decision to hold the train until police arrived.
• 47. Power is fed into the electricity line through an underground cable.
• 48. The electricity line is fed with power through an underground cable.