Dictionary
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underground
English
- 🔊 under the level of the ground“belowground storage areas”
- 🔊 conducted with or marked by hidden aims or methods“clandestine intelligence operations”
- 🔊 a secret group organized to overthrow a government or occupation force
- 🔊 an electric railway operating below the surface of the ground (usually in a city)“in Paris the subway system is called the `metro' and in London it is called the `tube' or the `underground'”
- 🔊 beneath the surface of the earth“water flowing underground”
- 🔊 in or into hiding or secret operation“the organization was driven underground”