underground adjective, adverb Meaning in Cambridge American English Dictionary
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Meaning of "underground" - American English Dictionary

See all translations

undergroundadjective, adverb [not gradable]

 us   /ˌʌn·dərˈɡrɑʊnd/
below the surface of the earth; below ground: an underground garage Something that is done underground is secret or hidden, usually because it is not traditional or is shocking or illegal: an underground newspaper Officials believe the sighting of the suspect may have forced him to go underground (= to become secret).
(Definition of underground adjective, adverb from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of underground?
Add Cambridge dictionaries to your browser to your website

More American English definitions for “underground”

Definitions of “underground” in other dictionaries

Word of the Day
dole

the money that the government gives to people who are unemployed

Word of the Day

Are you a glass-half-full person? (Everyday Idioms)
Are you a glass-half-full person? (Everyday Idioms)
by Kate Woodford,
July 29, 2015
A reader of this blog recently asked for a post on idioms that are used in everyday English. This seemed like a reasonable request. After all, if you are going to make the effort to learn a set of English idioms, you want those idioms to be useful. The question, then, was

Read More 

responsible luxury noun
responsible luxury noun
August 03, 2015
high-end, green tourism and hospitality Jumeirah’s ‘responsible luxury’ approach is an example of a sustainable travel experience – future guests will enjoy the environment as much as today’s.

Read More