Underground Definition
ŭndər-ground
undergrounds
adjective
Occurring, working, placed, used, etc. beneath the surface of the earth.
Webster's New World
Secret; hidden; undercover.
Webster's New World
Of or relating to an organization involved in secret or illegal activity.
Underground trade in weapons.
American Heritage
Designating or of newspapers, films, music, etc. that are unconventional, experimental, radical, etc.
Webster's New World
Of or relating to an avant-garde movement or its films, publications, and art, usually privately produced and of special appeal and often concerned with social or artistic experiment.
American Heritage
Synonyms:
noun
undergrounds
The entire region beneath the surface of the earth.
Webster's New World
A secret movement organized in a country to oppose or overthrow the government in power or enemy forces of occupation.
Webster's New World
An underground space or passage.
Webster's New World
A subway.
Webster's New World
An underground movement in media, films, music, etc.
Webster's New World
Synonyms:
- guerillas
- fifth-column
- partisans
- resistance
- Métro (French);
- tube
- subway
- metro
- subway system
pronoun
(UK) The London Underground.
Wiktionary
adverb
Beneath the surface of the earth.
Webster's New World
In secret; stealthily.
American Heritage
In or into secrecy or hiding; so as to be undercover; surreptitiously.
Webster's New World
Below the ground.
The tunnel goes underground at this point.
Wiktionary
Secretly.
Wiktionary
verb
To situate under the ground.
Workers undergrounding telephone lines.
American Heritage
To route electricity distribution cables underground.
Wiktionary
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