Underground Meaning

There are 4 meaning(s) for word Underground

Meaning 1 : conducted with or marked by hidden aims or methods

    Example : underground resistance

    Synonyms : clandestine,  cloak-and-dagger,  hole-and-corner,  hugger-mugger,  hush-hush,  secret,  surreptitious,  undercover
Meaning 2 : an electric railway operating below the surface of the ground (usually in a city)

    Example : in Paris the subway system is called the `metro' and in London it is called the `tube' or the `underground'

    Synonyms : metro,  subway,  subway system,  tube
Meaning 3 : a secret group organized to overthrow a government or occupation force

    Synonyms : resistance
Meaning 4 : under the level of the ground

    Example : underground caverns

    Synonyms : belowground