Definition of Underground
- 1. A secret group organized to overthrow a government or occupation force Noun
- 2. An electric railway operating below the surface of the ground (usually in a city) Noun
- 3. In or into hiding or secret operation Adverb
- 4. Beneath the surface of the earth Adverb
- 5. Under the level of the ground Adjective Satellite
- 6. Conducted with or marked by hidden aims or methods Adjective Satellite
Synonyms for word "underground"
Semanticaly linked words with "underground"
Hyponims for word "underground"