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- Dictionaryun·der·ground
adverb
- 1. beneath the surface of the ground: "miners working underground" Similar
adjective
- 1. situated beneath the surface of the ground: "underground parking garages" Similar Opposite
noun
- 1. a group or movement organized secretly to work against an existing regime: "I got involved with the French underground" Similar
- 2. a group or movement seeking to explore alternative forms of lifestyle or artistic expression: "the late-sixties underground"
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: an unofficial, unsanctioned, or illegal but informal movement or group. especially : a usually avant-garde group or movement that functions outside the establishment.
UNDERGROUND definition: 1. below the surface of the earth; below ground: 2. An underground activity is secret and usually…. Learn more.
noun. the place or region beneath the surface of the ground. ground. an underground space or passage. a secret organization fighting the established government or occupation forces: He fought in the French underground during the Nazi occupation of France.
UNDERGROUND meaning: 1. below the surface of the earth; below ground: 2. An underground activity is secret and usually…. Learn more.
Something that is underground is below the surface of the ground. Solid low-level waste will be disposed of deep underground. The plane hit so hard that one engine was buried 16 feet underground. Synonyms: below ground, in the earth, under the earth, below the surface More Synonyms of underground.
secret or hidden; not openly practiced or engaged in or shown or avowed. noun. an electric railway operating below the surface of the ground (usually in a city) synonyms: metro, subway, subway system, tube. see more. noun. a secret group organized to overthrow a government or occupation force. synonyms: resistance. see more. Cite this entry. Style:
1. occurring, situated, or used below ground level: an underground tunnel; an underground explosion. 2. secret; hidden: underground activities. adv. 3. going below ground level: the tunnel led underground.
Definition of underground adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
underground meaning, definition, what is underground: below the surface of the earth: Learn more.
UNDERGROUND definition: 1. under the surface of the ground: 2. Underground political activities are secret and illegal…. Learn more.