underground adjective, adverb - definition in the American English Dictionary - Cambridge Dictionaries Online

Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “underground”

See all translations

underground

adjective, 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

force somebody's hand

to make someone do something they do not want to do, or act sooner than they had intended

Word of the Day

They sometimes go here and they never go there: using adverbs of frequency

by Liz Walter,
April 29, 2015
Sometimes, always, often, never: these are some of the most common words in English.  Unfortunately, they are also some of the words that cause the most problems for students. Many of my students put them in the wrong place, often because that’s where they go in their own languages. They say things

Read More 

Evel abbreviation

May 04, 2015
English votes for English laws; the idea that only English (as opposed to Scottish, Welsh or Irish) MPs should be allowed to vote for laws that affect only England Yet these are the two principal constitutional proposals that have come from the Conservative party in its kneejerk response to Ukip’s English nationalism and

Read More